it did fix it for now, need to see if it remains fixed. It was dieseling before that all went away very odd I must say but I did notice in a post of yours you said runs better after an oil change (your car) well this gives that statement alot of meaning but I still don't understand the why....AMSOIL synthetic is like water if it will not go through those screens no oil will. This car has not run right since day one, I am going to recheck fuel mileage and see if this corrects the consumption.