So,if it's okay, I'm going to jump in and ask a couple questions. I think that this thread is kinda cool because, after 5 years, I'm kinda getting bored with the whole "must buy only VW-branded fluids" thing. (Perhaps we need to start a similar thread for coolant, lol.)
First off, is there some thread here or an external link to some sort of guide as to what all of these numbers on these UOA's really mean? Some sort of guide for analyzing the analysis?
Second, I've noticed a few people mention using Amsoil DEO 5-40. Amsoil also markets a "European Car Formula" (AFL) which I have used for one OCI in my car. What is the difference and why are people here running DEO in lieu of AFQ?
Third, I noticed that there is a link to the Valvoline "Cummins Rated" 5-40 synthetic. Does anyone have any comment on this? I used it once, about 3 years ago. I noticed a drop in fuel economy. The engine didn't puke or anything but I've never used it since. I think that the reason I ditched it was it seemed more appropriate for big rigs. (It doesn't meet a single ACEA standard, either as virtually ALL of it's standards are for bigger engines.) I was in NAPA today and noticed that it was just under $18 a gallon.
I continue to search for a non-dealer, non-mail order, oil for my car, and preferable at a reasonable price. To date, all that I have found is Amsoil and that Valvoline stuff. (I just found lubrimolly 5-40 505 approved for $10/qt-kind pricey-as much as the Amsoil.)