I own a 1997 Ford F150 Flareside with the 4.6 V8. The owner's manual recommends a 5w30. The dealership and a mechanic friend suggested that I use the 5w30 instead of a 10w30 because the oil will get to the overhead cams faster. The truck has 86,000 miles on it. I have not had a any problems with this truck. I am have use Valvoline 5w30 exclusively with no problems and currently using Valvoline Max Life 5w30. I live in South Texas.
Would it hurt to go to a 10w30 with the overhead cams?
Would it hurt to go to a 10w30 with the overhead cams?