[s-cars] Castrol GTX High Mileage Oil

[J. Khang]

I have used mineral and semi-synthetic oil in the S6 for much of the last 60k miles with no issues and I use 10W30 in equatorial climate for the scheduled 10k miles between changes. I also leave the oil in there for however long it takes to complete the 10k miles, even if it takes two years. It consumes roughly the same amount of oil now as it did when I got the car at 107k miles, which is about a litre every 2200-2500 miles. The only thing I make sure of it that HTHS > 3.5 and I use a diesel engine oil that is suitable for petrol-engines too.

Jonathan
'96 S6