BMW Fuel System Cleaner is Techron
 

From what I can tell most of you on this board already know that BMW fuel cleaner is really Techron from Chevron. It just so happens that I recently had a bottle of each and did a compare. Both of these are the 20oz bottles. Check out the pictures. The bottles are identical with both including the Chevron brand name on the bottom. In the 2nd picture the one on the left is the BMW bottle.

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Nice catch, but why would you ever pour that into your gas tank??? :confused:

you never done that? I do that every 6,000 miles. Why? run search and you will find out. :)

You are much better off using good fuel, with sufficient additives, but as that is not always possible there are additives available to correct problems associated with the build-up of deposits. BMW recommends not using additives, but they acknowledge the need in some cases. I just wouldn't ever use them as a preventative measure, given the other problems they can cause.

Every 6,000 miles is a bit of an overkill. As JCL have pointed out, it's much better to consistently use quality top tier fuel, which should already contain such additives. With that said, I still do use the Techron additive on all my rides, but only every 20K miles or so and I made sure that burned all of it off within a day or two.

Us Porsche guys swear by Techron. The usage is Alway use Chevron gas.
then on the gas tank before an oil change put in a whole bottle of Techron.
THe techron will get by the rings and get in your oil. Burn all the gas
change oil.
Really works well.

BMW's latest TSB specifies to use a bottle of gas additive every 3,000 miles and to only use Top Tier Gasoline, which includes Chevron, Shell and 76 among some others. Go to www.toptiergas.com for more info.

By the way, BMW sells a bottle of this stuff for $12.50 retail and 10% off with BMW CCA discount. Pep Boys carries the Chevron version for $13.99 !

thats what they say...overkill, i use premium fuel only and add that every 6K miles. Call it coincidence, but perhaps, thats the reason why i never had any problems with my E46 and my X5 on engines, anything related to fuel beyond 100K miles? I may be good or not in taking care of my BMWs but hey, lasting this long with that kind of practice encourages me more to continue doing it that way. :thumbup:

DKL, well, if you think im doing overkill, what do you call this then?

we used only chevron or unocal.

intake valves were deposit free after 100k miles on the x5 4.4.

I used to put redline fuel system cleaner every 30k or so but not anymore.

I would like to see the actual TSB that recommends using additives every 3k. If that's the case, then there's definitely a design flaw in BMW engines since no other manufacturers have this recommendation. It's a catch22 when using fuel additives. While it's great for fuel injectors and intake valves, the concentrated additives isn't good for alot of the other components in the fuel system.

yes of course, i respect your opinion and all the things you said makes sense. I was just saying that it's been my practice, although i have never encourage anybody to do it. It might be or not be because of it that my bimmers last long without any problems, but it's just me. But i have deep respect for you sir :thumbup:

This is a very good debate, but I go back to my original post - I have 81K miles on my X5, never poured anything like that into my tank. The car runs fine, so should I start dumping that stuff in once in a while? :popcorn:

yes.

I never heard of some of those companies; and I'm surprised not to see Exxon Mobile on there.

I purchased my 2004 X5 used in 2006. Whenever I got stuck in bumper to bumper traffic on the freeway my X would jerk like it was going to stall. The only way to stop it was to give it a little extra gas. I took it to the dealership and they told me my engine needed to be decarbon because of build up. It cost $170 to get the decarbon. Afterwards the mechanic told me to only use Chevron gas and to put a bottle of the fuel cleaner in about every 3000 miles.

Well since 2006 I have only added the fuel cleaner twice and my car is running fine. I think every 3000 miles is too aggressive since I am using Chevron gas which includes small amounts of Techron anyway. So maybe once or twice a year for me.

Decarboned?

What did they do for <$200 to "decarbon" it?

I don't recall the exact steps but I think the mechanic said something about doing a pressurized flush on the engine (but don't quote me on that as its been 2 years since I had the conversation with him).

I did keep the receipt. Here is what it says:

Installed 82 14 0 413 341 :FUEL SYSTEM CLEANER [email protected]
ENGINE DECARBON COMPLETE
Labor: 137.95 Parts: 32.00 Total: 169.95

Based on the receipt it looks like they charged me 137.95 to add two bottles of cleaner!

THis is funny because Porsches recommended fuel additive is Techron

I use a fuel system cleaner every few thousand miles. I use to use Redline, but I cannot find it in stores anymore. My question is, can you use the techron with Shell gas, or is it better to use it with Chevron?

Listen to JCL. He knows his stuff when it comes to this. It is much better to get good gas like Chevron or other fresh fuels with good detergents every time you fill up then to buy second grade fuel and then try to remedy the issues with fuel system cleaner.

I also noticed about a year ago that the BMW fuel system cleaner I paid twice as much for from the dealer was manufactured by Chevron. I won't ever buy it from the stealer again.

The TSB has been republished by BMW practically every year now, going on a few years. If I can find a copy I'll try to post it. You should read about the history of carbon deposits on intake valves and so forth. BMW was instrumental in investigating the problem years ago (like in the 80's) and actually did independent testing of fuels to determine how much deposits form for a given fuel. I believe it was called the "BMW Test." They took a brand new engine, took it apart, weighed all the major components very accurately. Put it back together. Ran the engine for 50,000 miles or something like that in a lab and then stripped it again and re-weighed all the components. At the time they determined that Chevron gas was the least offensive, though all gas left deposits. Working with Chevron they decided to package their detergent (Techron) in concentrated form for a cleaning "boost" and recommended to do it on regular intervals to maintain performance. Chevrons own testing determined that Techron was safe for all major engine components and has been in all their grades of gas for decades now. (So I'm not sure where is your data on it not being good for fuel system components maybe you should send it to Chevron.)

As far as other manufacturers recommendations, I really could care less what honda, toyota, or anyone else has to say on the matter...that's why I have a BMW and have only purchased BMW's for the past 30 years.

One of the BMW TSBs is here:

http://www.bmwtis.com/tsb/bulletins/...p/B130206g.htm

Note that it says to use good quality gasoline. If you can't do so, the 20 oz bottle of Techron is second-best.

I have worked on engines that had an additive poured in, to fix a problem caused by a build-up of deposits. The result was that the deposits were cleaned out, but didn't make it out of the engine. They caused consequential damage to the engine. It was an expensive fix for the owner, involving engine disassembly.

I stand by my previous recommendation: use good quality gas. If you can't, use a Techron-based additive, but realize that they are not without risks.

The BMW deposit test was many years ago, and was similar to a Honda test and a Toyota test. Gasoline at the time did not have sufficient additives at many stations to control deposits on intake valves, a very specific problem that is not the same as the injector problems many manufacturers have had.

EDIT: The SAE report on the Toyota study is here: http://www.sae.org/technical/papers/922265. Note that it is from 1992; as I said, the original issue was many years ago. The BMW test is documented here: http://www.swri.org/3pubs/brochure/d08/qualify/qual.htm. It is from 1985, with the SAE paper presented in 1987 (I belonged to SAE at that time, and remember this series of papers). Given the progress made in the last 25 years in engine technology (ie injector pressures), the tests are interesting but less relevant.

Some other brands use cleaners other than Techron; some brands purchase the rights to use the chemicals that Chevron brands as Techron.

Techron is safe, but not in very high concentrations, IMO. That isn't news to Chevron.

Excellent comments, thanks for sharing and also for the great links. I can't believe I was right about the date! (1980's)

While those issues seem to more of the past then the present, speaking to BMW techs lately, high alcohol content in fuel is the current problem. One dealer told me of M3 / M5 owners in particular complaining of huge power losses that they couldn't explain or understand. After lots of diagnosis, it turned out their fuel alcohol content was enormous. The dealer would drain all the fuel and refill the car with specialty fuel they have in tanks and problem was solved. I believe BMW has a SIB on this as well.

In the end I think it basically depends on how one wants to run their car. I know people who change oil every 25,000 miles, never changed coolant, brake fluid, etc. put in the cheapest gas they can find, and have yet to experience any consequences. Personally, without going too overboard, I think that a precision instrument should be maintained accordingly. Thus I use the best gas I can find, only Shell or Chevron and always Super unleaded, and I always add BMW gas additive every 3,000-5,000 miles.
YMMV.

From what I have read gas mixture is not an exact science. Many factors can affect the mixture. With that in mind how do you know that the gas you purchase has the right level of cleaner in it? What if it is a little low? If you put a bottle of cleaner in your car periodically then you know for sure the engine is being maintained properly.

i use SEAFOAM additive in the oil system and the fuel system. I've used in the E36 M3 for years now and it runs strong even after 10 years of abuse

Anyone use Lubro Molly?

I think Yamaha also repackages Techron for marine engines.

Carbon in 2 cycle engines can cause the rings to stick/break.

That's the point and you're right. That's why BMW and several other manufacturers banned together to verify and certify those fuels that meet a certain level of performance and detergent content. That is what Top Tier Gas is all about. And like I said before, in addition to that gas, I add a bottle regularly and so I know at least I am doing my best to keep the car running good.

I have used their Jectron and Ventil Sauber in my old e30 325e and my current e36 325i. I actually performed the "hot soak" in the 325e where you remove the vacuum line at intake manifold and actually let it suck the cleaner up. It made me feel like I was doing something good for the car, almost like giving it angioplasty or something, but I can't honestly guarantee that it actually did anyhting to help the engine.

I am a little hesitant to add anyhting extra into the tank of the X5. I use Chevron gas almost exclusively and I feel that is good enough. The 4.4 V8 has enough issues on it's own, I don't really want to do anything to increase the chances of anything else going wrong. I still agree with JCL that using a high quality gas with good detergent on a daily basis is the best way to insure that you won't have an unusual build up of deposists in the first place. If you never give the desposits a chance to build up, then you wont have to worry about the concentrated fuel system cleaner breaking these deposits loose into your engine. Sure, some tankfulls of gas you get will have more detergents than others, but overall good quality gas like Chevron with Techron should do enough to keep your engine as clean as it should be.

I will say that I looked back at an invoice from the dealer when they did my Inspection 2 at 65k and there was $12.95 charge where they added a bottle of fuel system cleaner, which was most likely the Techron. Apparently BMW doesn't see anyhting wrong with adding this every 30K. However, we all now their thoughts on lifetime fluids and oil change intervals, so I am not sure how much I would read into that.

Sorry to say this (and I hope I am wrong), but it looks to me like they charged you $32 for $14 worth of fuel system cleaner. Then had the balls to charge you another $130 to pour it into the gas tank.

I would get another dealer.

-------

I looked further and I see that this is a 'legitimate' service.

It's not as simple as people would think. The dealer is NOT dumping the fuel system cleaners into the gas tank, like you would do with regular cleaners. Noticed that they charged him $130+ for labor. That's because the dealer tech had to disconnect the fuel line and connect the fuel system cleaners directly to the fuel rails and run the engine directly from those bottles, without mixing with the gas in his tank. This is the super concentrated stuffs.

I've used Techron additive with Shell gas because there are no Chevron stations in my vicinity. My X has not blown up yet, so I guess it's OK...:D.

On a related note, I don't claim to be an expert on this issue, but isn't it also possible that BMW advises against fuel additives because they can't control what TYPE of brand folks will pour into their tanks? Obviously if you're using a lower quality additive BMW doesn't want to (nor should they) foot the bill if something goes wrong with the fuel system.

:iagree: 100% with DKL.

I did a little more research and looks like prices are all over the place for this service. I read in one place that it is a 'ten minute' service. And after checking a bit more, it reminded me that my Mazda dealer trying to get me to cough up $400. I told him no.

It seems to be a good service if you are having problems, and a waste of money if you are not.

It takes longer then 10 minutes.. Took about an hour and half for mine...there was no down time either...It was on the machine for that long...

And evidently Saab Fuel Cleaner is really just BMW Fuel Cleaner!

i make techron part of my maintenance for all my vehicles.

SIB 130506

http://www.bmwtis.com/images/homelogo.gifSI B 13 05 06
Fuel SystemsSeptember 2006
Technical Servicehttp://www.bmwtis.com/tsb/bulletins/...mp/graybar.gif
SUBJECT
BMW Group Fuel System Cleaner Plus

MODEL
All

SITUATION
Recent field experiences have shown a significant increase in various drivability complaints due to excessive carbon deposits in engine's combustion chambers, on the intake valves and fuel injectors.
The overall rise in carbon deposits accumulation is generally attributed to poor gasoline quality, namely, low level of cleaning additives and fuel contamination.
TECHNICAL BACKGROUND
Combustion chamber deposit formation is a by-product of the gasoline burning process. Fuel injector and intake valve deposits may become less troublesome with the recently introduced Top Tier Detergent Gasoline deposit control standards, which are exceeding the detergent requirements imposed by the EPA since 1995.
However, vehicles that do not exclusively use a Top Tier Detergent Gasoline, or are regularly driven in severe service conditions, such as stop-and-go traffic, high ambient temperatures, and high altitude can experience performance problems caused by intake system and combustion chamber deposits.
The most common customer complaints may include:
FUEL INJECTORS
Deposits at the injector's tip can impact fuel flow, upsetting the air/fuel mixture ratio.
Symptoms: Hesitation or stumble during acceleration, even loss of power. Poor fuel efficiency. Increased emissions of HC and CO. "Service Engine Soon" light illumination due to intermittent misfire faults, or lean mixture adaptation values
INTAKE VALVES:
Deposits at the valves and on the intake manifold ports can absorb fuel during the warm-up phase, leaning out the air/fuel mixture ratio. Carbon build-up may disturb mixture flow at low throttle conditions/idle speeds.
Symptoms: Poor drivability, loss of power, unstable/rough idle, increased emissions of HC, CO and NOx. "Service Engine Soon" light illumination due to intermittent misfire faults.
COMBUSTION CHAMBER:
Combustion Chamber Deposit Interference, or CCDI, occurs when there is a contact between carbon deposits on the piston crown and cylinder head. The noise can be confused or misdiagnosed as ping, knock or other noises that could indicate a mechanical failure. CCDI occurs first as a cold start noise that can fade as the engine warms to operating temperature. The noise will reoccur at the next cold start. As deposits build, there is an increase in compression temperature that may cause pre-ignition detonations.
Symptoms: Knocking, pinging, run-on, poor acceleration, octane requirement increase, increased emissions of NOx, engine idle speed surges.
Depending on the manufacturer, fuels may contain various additives such as: oxidation and corrosion inhibitors, metal deactivators, emulsifiers, anti-icing agents & dyes, plus they are required to include some form of an intake system deposit control package. Unfortunately, not all fuels are created equal, and some additive packages are not effective enough to maintain integrity of the intake systems in high performance engines, or engines operating in severe environmental conditions. Even worse, the intake system deposit control additives in some fuels may actually contribute to the combustion chamber deposits accumulation, and to the problems associated with those deposits: knock, run-on and increased emissions of oxides of nitrogen.
RECOMMENDATION
BMW recommends using TOP TIER Detergent Gasoline of minimum octane rating of AKI 91 and with alcohol content of less then 10% by volume (or any other oxygenates with up to 2.8% of oxygen by weight). Only the exclusive usage of TOP TIER Detergent Gasoline provides the full benefit of reducing deposits formation. For more information related to TOP TIER Gasoline refer to SI B13 02 06.
If the TOP TIER Detergent Gasoline is unavailable, we recommend BMW Group Fuel System Cleaner Plus (PN 82 14 0 413 341) be added to the gas tank. For optimum cleaning and deposits control, add a 20 fl. oz. bottle every 3,000 miles when refueling.
Regular use of BMW Group Fuel System Cleaner Plus can help address carbon deposits related symptoms listed above. By removing these deposits, an engine may experience restored power, performance and fuel efficiency, a smoother idle running, lower emissions, and reduced octane requirement.
BMW Group Fuel System Cleaner Plus uses polyether amine TECHRON® based technology developed and patented by Chevron. BMW Group Fuel System Cleaner Plus has proven to clean up deposits in fuel injectors, ports & intake valves and reduces the harmful effects of combustion chamber deposits. It helps restore performance lost due to deposit build-up.
Chevron and BMW have run an extensive "no harm" tests with polyether amine technology. When used as directed, it will not harm catalytic converters, oxygen sensors, or any other mechanical components of the engine, or fuel delivery system.
The effectiveness of the additive depends on its presence in the gasoline in large concentrations for short periods of time. One treatment is usually sufficient, but a second treatment (one 20 oz bottle per each, consecutive full tank of gas) may give additional benefits. To keep your fuel intake system clean, we recommend usage at every 3000 miles.
Additionally, vehicle's fuel sending units equipped with silver plated resistor card/contacts are especially vulnerable to attacks by elemental sulfur and/or hydrogen sulfide found in fuels. Adding BMW Group Fuel System Cleaner Plus immediately upon noticing erratic fuel gauge behavior may, in many cases, restore proper performance due to the additive's ability to remove the harmful sulfur compounds from the sending unit's contact surface. Additionally, BMW Group Fuel System Cleaner Plus can help protect the fuel gauge from future malfunctioning by coating all metal surfaces of the fuel system.
http://www.bmwtis.com/tsb/bulletins/...E/S1306U02.JPG

BMW Group Fuel System Cleaner Plus.
PN 82 14 0 413 341,
1 bottle, 20 fl. oz.
Ordering in multiples of 6 bottles per case.
PARTS INFORMATION
Part Number
Description
Quantity
82 14 0 413 341
Fuel System Cleaner Plus; 20 fl.oz. bottle
1
WARRANTY INFORMATION
Because carbon deposit build-up is related to fuel quality, it cannot be considered as a defect in vehicle's materials or workmanship. Consequently, usage of BMW Group Fuel System Cleaner Plus is not covered under the terms of the BMW New Vehicle Limited Warranty or maintenance plan.

mgruber, Good dig :thumbup:

my 2 cents. I have an aversion to Chevron as it always seems to be 2-10 cents a gallon more expensive. That said, I have switched to Shell from Phillips 66/Conoco/76 (before that Mobil & BP). Previously my fuel guage would stick and 19mpg was the best I could get out of my '01 4.4 Sport. Now the fuel guage nolonger sticks and mileage is a least 1 mpg better across all driving conditions (actually 2+ in local driving[not rush hour driving]) after over 1 yr of using Shell (Supreme)

Here is what I found out yesterday after speaking with my BMW service adviser. He recommended me to use the BMW Group fuel system cleaner PLUS when switching between fuel types. He actually gave me a free bottle (nice guy, Eduardo from BRAMAN BMW in WEST PALM BEACH, FL). I highly recommend this guy if you are in the WEST PALM BEACH area or near this area.

When we first got the car my wife was putting Chevron Premium fuel (no fuel consumption issues there). After the gas started to increase in price I switched to COSTO premium then when to using BP Premium fuel since I was getting a 10% off after getting a BP Visa card from them. From now on, after our little chat I'm putting the free 20FL OZ of this fuel system cleaner and filling up with chevron premium on my 2007 X3. BMW recommends using this every 3K miles. My BMW adviser told me to "just use this every so often and to just use the chevron midgrade fuel, otherwise you are throwing your money away". He used to be a BMW tech before and never had any issues with the bmws he had and have now (2007 X3 like mine) since using Chevron fuel. He swears by Chevron fuel and claims he doesn't get anything for suggesting to use Chevron products on BMWs. The issue popped up after I asked about some fuel consumption issues I've had after using BP premium. What is interesting about all this is that I love the BP premium in my 2007 Ford F150. For some reason is making the truck run nicer and is giving me more milage and better response when accelerating than before, therefore is more efficient. However the 2007 BMW X3 is not running as efficient after using BP Premium. I'm not crazy about adding extra fuel system cleaners but will do this only this time for now, since I'll be switching from BP premium to Chevron Premium. That should have all the fuel cleaners additives included without having to add anymore in the future. Let's see how that goes. By the way, the BMW Group fuel system cleaner PLUS is made by Chevron, just like the stated on the first post of this thead (i have a bottle right in front of me). ;)

I have always used Exxon 93, is there any where I can find out what additives or more info on Exxon's gas?

I am going to start using Texaco here soon to see if there is a difference.

I have always used Exxon 93, is there any where I can find out what additives or more info on Exxon's gas?

I am going to start using Texaco here soon to see if there is a difference.

I used to use the Chevron additive on my C230 (BTW Costco $18.99 fora a box of 6 bottles) then I've switch to Lubro Moly Jectron gas additive in combination with Lubro Moly Ventil suber for valve cleanning for the c230 and the X5

Costco only sells the Fuel Injector Cleaner, NOT the Fuel System Cleaner.

you yanks seem to know a lot about whats in what petrol.

I dont think we brits do. Only about 3 main suppliers .. shell, BP, texaco.

Anyone who where us brits can get this chevron stuff down in the UK. Maybe its time to start keeping an eye on my engine :)

Hey all,

01 3.0X5 110k miles. I am somewhat of a materials engineer. My two cents.

1. Decarbon your engine. This is done with kerosene in kerosense based cleaners added to your oil. Add a quart to a warm engine. Yes your crankcase will be overfilled for a few minutes. Run engine for 5-10 minutes. Then change oil. Kerosene dissolves carbon pretty well and quickly. This is an old farm trick which is valid for all gasoline engines. Just read the ingredients on that $9.00 quart of internal engine cleaner/oil additive---90+% is kerosene.
2. Had a BMW tech tell me the fuel issue is about the sensors associated with the fuel injectors. Each injector has a sensor. It is the sensor which collect deposits easier than the injector. If the sensor is dirty then it thinks that cylinder has fuel so it takes it out of the firing sequence which makes the engine run rough and have no power. Poor grade gasoline varnishes the sensors faster than higher grades. Fuel additives are the fix here.
3. Gasoiline.....with todays orchestrated crisis you never know what you are getting. My uncle owns a gas station and has said that it is worse to buy gas when his tanks are near empty (crappy deposits more concentrated in what remains to be sold) and for a few hours after his tanks are filled ( filling stirs up the sludge in the bottom of his tanks). This seems logical to me. Newer pumps have better filters but no owners are religious about their maintenance.
4. Its also not a smart idea to ride around with your gas guage light on. It might conserve you a few dollars in the short term but it will eventually cost you in the end.
5. All BMW owners should realize that these engines are fussy, overengineered and beyoned the knowledge of your average shade tree mechanic. It is the price we pay for superior performance and that egotistical cool factor we publically deny but secretly smirk about....heheh.

Drive safe....drive often.....it is a right the greenies long to take from us....and makes us into Euro loving tree huggers crammed into smart cars.

on my list of top 5 posts on XOUTPOST!!! :thumbup:

ok, back to researching engine and fuel additives.

Interesting new recommendation from BMW (1/2010).

i choose to ignore this. This is just a marketing thing, BP is paying BMW a lot of money for this, and BP is not on the Top Tier gas list. this is a contradiction. and BP gave me 50miles less per tank. Shell/Chevron for me only.

Interesting point. I also thought it was strange that BP wasn't top tier yet this statement makes it sound like it's even better. I too am 100% Shell and Chevron and nothing else.

:iagree:Seems strange they are not even on the Top Tier list, but now they are recommended above anything on the list. :confused:

Also agree on Shell and Chevron. However, I also throw Texaco in the mix as well seeing as Chevron owns Texaco and they both use Techron.

Best thing for these engines is quality fuel, Shell, and longer trips once a month or more. Gives us an excuse to take a weekend mini vacation :D.

I might use a cleaner in the X5 once a year. I'm too freaked out about putting anything but pure Shell 91 or higher in my Mercedes, those damn things are way too touchy:confused:! The BMW seems to be more DIY friendly and tougher:thumbup:

None of these work. As long as you use "good" premium fuel you will be fine. Chevron or 76 are the gas stations to work with.

I've never added this stuff to my gas tank. i'm at 76k miles, i'm scared to put anything in.

Should i? and do i need an oil change after i do so?

Seafoam, abit in the crankcase and the rest in the gas tank every 10k or so. That plus high quality gas has worked for me. Great insight and advice by all on the forum.

Major overkill if you use good gas and oil, IMO.

IMO noted and respected but this has worked well for me for years. To each their own.

Hi, I used the bmw fuel cleaner in May, I was away for two months but I read that its good to get an oil change after. I will be going to get my service done this week.

Is this true? Does it affect anything since I wasnt driving it?

Thanks

If you use a cleaner that is put directly into the manifold, it is a good idea to do an oil change afterwards. If you simply added the Chevron cleaner to a tank of fuel, there is no reason to do an additional oil change.

If you are storing a vehicle, it is always better to do an oil change immediately before you store it, not after you take it out of storage. That said, for two months I wouldn't worry about it at all.

many years ago i worked in a specialist tuning place that specialised in Triumph cars

the tr6 at the time had a mechanical fuel injection system.

people would regularly bring them in running terribly, and we did what we called a 10,000rpm tune up, these cars needed to be driven hard, but months of city driving gummed up the injectors and valves etc, so a hard fun around the back streets did the job, the junk that came out of the exhaust was amazing, and after 5 to 10 miles the thing would be purring, and not a spanner laid on it.

fast forward to today and the effects of varying fuel and city driving takes its toll

however electronic engine management helps to disguise the symptoms, and thats where de-carbonising can come in or the use of additives, alternatively take the car to a quite area and make it work for its keep, your car will love you

Ewen

I would have voted for a fuel stabilizer like Stabil, for a 2 month sit,
but the Techron cannot hurt. I'm with the skip-the-oil-change-now,
Gang. Fire it up, (assuming your batt is ok), and go drive the sumbitch!
GL, mD