99WhiteC5Coupe
Full Access Members
My 4.6l has 5w30 on the cap and the manual. I was told by dealer that a Ford TSB was issued, allowing 5w20 in engines labeled 5w30. However, I always ask for 5W30. I was given 5w20(by a Ford dealer) and it burned off almost a quart between changes. The insisted they put it in everything, with no issues. Who knows?
The 19- years old oil change tech with 3 weeks experience surely knows more than the Ford engineers that designed the engine........