Vw recommends Castrol I wouldn't use anything else
Right now I run 15w-40 Shell Rotella Diesel engine oil in my bug. You can see below the Zinc & Phosphorus PPM (the higher the better). So you can see that Shell Rottela & Napa Diesel oil has fantastic for wear protection for the aircooled flat tappet cams.
Castrol Syntec 5w40 is stout enough for the 10,000 mile oil change.
I use Shell Helix 10W-30 for my Sciroccos. No probs! :thumbup: I always have a 60 litres barrel in my garage for my cars.
From what I've seen, the t6 holds up well, doesn't shear quickly, does well with fuel dilution, protects surfaces well, since the metal readings go down, etc. I don't see any negatives, regardless of what that article says
Rotella T6 is great oil (lots of STI guys run it) and I wouldn't hesitate running it in my R... except that it isn't VW 502 approved... so warranty is at risk if I had a failure in the engine.
The biggest advantage is that it's CHEAP and works well. I don't run it in my R...yet. I am still under maintenance free. I do run it in my Stage 3 B5 S4 and in my 1991 Audi 200 though. Haven't sent the oil to Blackstone for analysis, but haven't had any issues either.
I've used the OE spec Castrol syntec 5w40 since I bought the car brand new. Do my own oil changes every 5k with the stuff and no issues.
The extra fuel is indeed from my mainly DD of the R, but using Rotella is just fine.
Rotella T6 5w40 in my R is running great
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