|
If you have been changing your oil like you should I'd go right to synthetic and not look back. Be honest, have you been a good boy? If not I'd use the high mileage blend that valvoline makes in a 5-30. If no leaks after a few thousand miles you could get away with a synthetic or a 5w-20 motorcraft blend. Like the above poster said you should get a reliable oil pressure gauge and at least go to the 5-30 of the same oil you have been using and see what the gauge tells you. To make this even more complicated, some 10w-30s end up being "thinner" after use than a 5w-30.
__________________
|