Just wanted to post my latest UOA for the Motul Specific i was running on my 08 VW GTI with the 2.0T. I've been searching for a better vw 502 approved oil that would resist some of this motor's tendency for shearing. 75% highway and 25% city, only Shell 93, no injector cleaner additives... also, my car uses NO OIL between 3.5-4k change intervals, so all these UOAs are done without makeup oil added. i'm hard on the car, usually in the boost when road/traffic conditions permit. occasional autocross thrown in every now and then. finally, the car has no motor mods.
the first two UOA's on the car were done with Castrol Syntec 5w40. i'm very happy with the downward trending in wear, especially iron, for my 2.0T. my iron / 1000 miles wear rate is below average for similar mileage 2.0T (please search for saaber2's posts for the trendchart). the motul maintained its viscosity a little better than the castrol, but still a lot of shear.
one of the big things that stood out was the addition of more calcium and boron in the place of magnesium in the additive pack. it was hard to find any relevant posts on boron... does anyone have any good information on the usage of boron as an anti-wear additive?
still encountering a fair amount of fuel dilution with the motul at 1%. certainly hurt the flashpoint a bit.
what do you guys think?
