Guys, Terry Dyson told us years ago that the only oils that cut it in these DI turbo engines are ester-based oils. The PAO-based are not making the grade, especially at long intervals. And this is exactly what we are seeing in the over 100 UOAs we have for the DI turbo Audi 2.0 FSI engine.
Originally Posted By: Terry
reb03, the M1 0w40 should not be run longer than 1000 miles to be safe.. Audi and BMW know they are having problems but are marketing tied to certain LARGE oil company that sponsors BITOG thus they cannot speak out about it.
TD
Originally Posted By: Terry
reb03, I have customers running BMW5w30, M1 0w40 all with the same effect, the wear control is good if we change the oil at 1000 mile intervals but the deposit formation from REAL volatility issues are slowly damaging the engines. I just worked a 07 335 Biturbo yesterday USING ASTM lab tests on the used oil and M1 0w40 went from VOA flash of 430+F to 280 F in 1150 miles, oil sheared to 12.1 cSt and fuel was at 1.99% by IR. Amsoil has not been tested in this engine yet. Because Amsoil is a traditional based PAO I predict similar results to the M1 0w40 which is still one of few M1 products that can perform reasonably well.
Terry
Also, how can this still be break in wear at this late mileage (the very high Mn may indicate high fuel dilution). ? We have cars that show less wear at much fewer miles:
On other forums (not as much on BITOG because poeple are actually taking the time to educate themselves) guys keep saying, "just trust the manufacturer if they say you can run 10k it's fine?". These folks need to look at the data and listen to Dyson who nailed the problem years ago.
Also, other users are coming to the same conclusions on their own:
http://www.e90post.com/forums/showthread.php?t=280168
Bottom line is that fuel dilution and the punishment these DI turbo engines are beating up the regular PAOs very quickly. If this were my car I would run the best ester-based oil I could find at a 5k interval and extend if the UOA supported it. Partially reacted fuel continues to degrade these oils over time. So running oils that are shown in both UOAs and expert advice not to deal well with fuel dilution for long intervals is not smart IMO.