Originally Posted By: mx5miata
I'll never trust oil for 1 year my oil is black as tar and smells like gas in 5k
The oil in my Mercedes is about 15 months old and still looks and smells fine. It has about 6k miles on it. It will be changed soon, but I think it would go longer with no trouble. I change it in that car typically at 12 to 14 months. It doesn't get a lot of miles on it, but runs great and the oil always looks good. It rarely does short trips, though. I run Mobil 1 0w40 Euro formula in it.