Prior to switching to this I ran Mobil Delvac 15w40 Dino for 100 k miles. LOA is identical both oils. I have run Delvac in DEtroits, Cats, and Volvo’s.
These days I do use T6 because I know the winters in south Texas aren't cold enough to worry about running anything lighter.
People like rotella because it’s a high zinc oil and subarus just like high zinc.
I run the Rottela 15w40 in my stock 05 Subaru Legacy GT (EJ255) and my mk4 supra turbo. Haven't had issues with the cats on the Subie, I do plan to remove them tho
Rotella 15W-40. I put that shit in everything. My Yukon, my Fit, and all 3 motorcycles. It’s legit.
We used to commonly use Rotella in our heavily modified Mazdaspeed 3/6's to combat the same issue. It worked great and the only problem we ever had was with what we called the "black death".
Mobil 1 Synthetic. im at 291k mi. no internal engine repairs. drive i hard every day. i change about every 6k mi. along with factory filter.
Mobil 1 0w40 why? its the cheapest 502 rated oil I can find.
I have a 2014 Audi A5 2.0T owned new since July 2014 and have done about half of the oil changes the car has had, myself. I have 61,000 miles now and the engine remains completely healthy as far as I know, with negligible oil consumption. My car has an electronic display virtual dipstick, not a physical one, and it takes several thousand miles before the oil level dips below "max" by "one notch" on the gauge picture. This type of Mobil 1 is 0W-40, which does meet VW 502. I never was able to tell any difference in feel or economy between the 2 weights of oil even though the Mobil supposedly should be a bit thinner at cold temperatures.
I've used Mobil 1 since 1986 in my other vehicles, but I don't want any issues with VW should there be an engine failure. Once out of warranty, I can buy the same oil for less at Walmart.
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