What weight Mobile 1 Synthetic oil is everyone using?
#5
AudiWorld Super User
Follow the owners manual recommendation.
#6
Gas mileage drops a hair with the 0W40.
I was using 10W30 prior (which should be the same as 0W30 when warm), and I lost about 1-1.5 mpg it seems. I'll probably end up switching over to 0W30 for winters, and keep the 10W30 for summers.