I recently took my car to get an oil change (rutin)I had always requested 10w-40 to be put in the car, the car was at the shop for one day for brakes etc. they (shop) put 30w grade in the car. after driving the car for a few days I notice grease film on back window and car using more oil than usual, now the car does not leak and has always used up oil. I did not call the shop because I know for a fact that they will tell me that 30w oil is the manufacturer recomended oil. My question is do I continue using 40w or is safe to go 20w50 due to the milage of the car?
Jan 20, 2008 at 11:17 AM
