No, I couldnt get service records, but it is a one-owner and no-accidents car in good overall shape. I have reasons to believe it was taken care of, at least for oil changes.

I did have the seller/dealer some work done before picking it up both Lower Control Arms, both Front Coil Springs, Rear Brakes with Rotors, Plugs, Air Filters, Wipers, Coolant. Now have new windshield too.

There are very few LL-01 approved oils, especially up north. For an oil to be LL-01 approved, it has to say on the bottle "Manufacture Approval: LL-01." If it says something like "Meets or exceeds LL-01," that is not the same thing and not a BMW approved product. Also, there is no BMW-branded 5W-40 anymore. The only LL-01 oil offered by BMW now is there "TwinPower Turbo 5W-30" oil. Some other oils to look for are Motul 8100 X-Cess 5W-40 and X-Max 0W-40; Pennzoil Platinum Euro 5W-40; and Liqui-Moly Special Tec 5W-30 and Leichtlauf 5W-40.

As for the oil burn, it could be valve stem seals (expensive), turbo seals (expensive), or any number of things. I would add a couple bottles of ATP AT-205 seal conditioner to see if that helps. Liqui-Moly also has a similar product "Motor Oil Saver" which has had mixed results.

Thanks. I just checked the Castrol Edge 5W-40 that I bought and the bottle doesn't seem to have any LL certification...unfortunately. So assuming I have that kind of oil in the engine from the oil change, may be it's a good idea to change oil early for me for the right kind. I still have 8,000 km to go before next change.

Regarding consumption, I thought it's ok for the german car to take some oil as long as I add it on time. I am not looking forward to have any $10k engine repairs done so that I don't add oil every month. I am planning just to add a litre as soon as the light comes up unless the cycle accelerates.

PS. I used to have an 1989 VW Jetta some 20 years ago and that thing had a gazillion km (odometer was obviously not working:)) and burned a litre each half-a-tank. Drove it ok for a couple of years.. smoked though:) under load.. uphill full throttle was just like a jet fighter with afterburners!!! different kind of fun!

No problem. As long as you stay on top of adding oil, you should be fine. I would definitely recommend running a bottle of Techron complete fuel system cleaner (try to find the 20oz bottle) every 3k kms, though. You will get lots of carbon buildup in the cylinders and on the valves with that kind of oil burning. I burn about a quart every 2k miles (3,200km) through the valve stem seals, and I add a bottle of Techron frequently. Carbon buildup can increase pre-detonation, which is extremely hard on engine components and bearings (especially in a turbo engine).

Thanks Entropy. This is very helpful. Is there only one kind of Techron? Any side effects? Is it commonly accepted practice?

There are two types. One is "complete fuel system" (the one you want), and the other is "fuel injector cleaner." The former has a higher concentration of the cleaning agent. It's a very common and harmless practice if you ask around.

Thanks. Apparently we dont have Techron easily available in Canada. I will buy some when I go to US. For now I bought a bottle of STP full system cleaner for C$13.99 (vs $5 for Techron in US) and poured it in.

Looked up a bunch of user reviews showing the same deposits on pistons before and after for all additives but have a bit of hope. Also read that these cleaners may result in a build up of a different film inside the engine..

I also decided to switch back to Esso as I had moved on to Pioneer for much better price. Now we get Esso supreme+ in Toronto and may be this will clean my engine from the deposits due to oil burning.

Also seen many posts with oil burning nmw turbo engines with various consumptions. Seems to be an accepted fact.. The more I think about it the more I want to buy a brand new engine...wait...it may burn oil as well. I imagine it would cost 50% of my C$40k X5M)

Was there a TSB indicating the oil for the S63 to be 5w-40? I though the oil was suppose to be 5w-30.

please don't turn this into another 50 page oil thread on what is the best oil. Here's my recommendation.

-Get oil that is LL-01 certified
-shorten the oil change interval
-If you plan on trying different types of oil, start getting oil analysis so you can compare and make informed decisions. (choosing based on what others say is not very helpful)
-note that oil level may be off with changes if there's an vacuum leak

Thanks. Shorten intervals to what extend? 3k miles? 5k miles? What will I be trying to achieve with this? I understand that the best deal in Toronto for oil change is
at dealer for C$165 or so - I will have to confirm that. I will also buy spare oil from them to fill up my 2-stroke monster)

What do you mean by oil analysis?

I get my oil analysis through blackstone
https://www.blackstone-labs.com/

You can try an oil interval around 6k. When filling out the form for the oil analysis you can indicate if you're interested in extended oil use. Details on the oil will be provided to help you make the decision if you want to extend or shorten the oil change interval.

What most people are looking for is to have less oil changes....save time and money. Though long periods between oil changes raises the chances of oil breakdown, loss of additives, and abnormal viscosity. The N63 in which the S63 is based off of, has some major oil related issues. A couple being the timing-chain and valve stem seals. There are many variables that might cause these issues but you can eliminate oil as one of the possibilities.