Quote:
Originally Posted by Best4x4xFAR
Linked from the Optilube website is this study..
If lubricity for your fuel pump is your main concern, it seems to indicate that the XPD is a much better better product for this than their Summer+ (XL product was not in this test)..
The XL and the Summer+ seem to have different objectives. The XL having the best lubricity increase rating, and the Summer+ having better Cetane improvements. Confused, where you planning to 'mix' the two?
Curious to hear the results of your testing, but you need to drive more! |
The Spicer test is a little old and outdated and yes it got Opti-Lube on the map but they have done some other testing since then -(but yes its usually the first thing you find)
FAQ on the products page is very helpful
Diesel Fuel Improver FAQ - FAQ
They talk about mixing, for example the XL is really a deposit and lubricant only, not much cetane additive, but the Boost is basically just cetane improver - so mixing the two at their lower ratios should really give a nice result.
Summer+ is basically the summer formula of XPD, without the Anti-Gel, and with more cetane boost additive (their Summer and Winter formulas are directly marketed at Power Service with the silver/white bottles)
XPD is the "all in one" which you can use in all temps depending on dosage (more XPD has more anti-gel) but if you live in frigid temps, Winter is better for that, because the cost is prohibitive on XPD when using "double dose" in winter
Read the treatment rates on each product page and calculate which additive makes more sense for your tank, again in MD you may get some temp dropping in winter so maybe Summer+, and keep a bottle of XPD handy when the temps dip?
Wear test done with XPD and XL, from Intertek labs:
http://opti-lube.com/downloads/intertektesting.pdf
Basically XL at the standard rate will lubricate as well or maybe a touch better than XPD at the standard rate. And its more cost effective if you aren't as worried about wanting cetane boost, or needing anti-gel additive.
And an interesting test, gasoline mistakenly added to diesel, very shocking considering the "oops" moments we've heard of -
http://opti-lube.com/downloads/Opti-...DieselTest.pdf
In regards to mixing, since its so cost effective, I was going to either run the Standard treatment rate of XL (2 oz per 20 gallons, which is what I use for our tank, close enough to capacity), and the Premium rate of Summer+ (another 2 oz, 1 oz per 10 gallons), and will give me all I want, plus the cetane boost, just without the Anti-Gel.
Alternatively, was thinking about doing the Premium XL rate (4-5 oz per 20 gallons), with the Premium treatment of Boost (2 oz per 20 gallons), for max lubrication and cetane.
Although accordingly to Opti-Lube's chart, the Summer plus has a *touch* more deposit control, however I'm thinking at the premium XL dosing, it should be a moot point. Summer+ really is the best of both worlds in the freezing temps though if you analyze the chart, and cost per dose.
I really don't think I have a *need* to use XPD year round because of my temps, standard rate is about 5-6 oz per tank, and in cold weather it needs to be doubled to 10-12 oz - Whereas I could use 2 oz of XL and 2 oz of Summer (or 2 oz of Boost and 2 oz of XL) and it will go a lot farther per tank.
