Originally Posted By: Camprunner
For my 2013 Mustang (5.0 Coyote V8) they recommend 5w20 weight oil. My car is a non Track Pack car if my car had the track pack they would recommend 5w50 weight full synthetic oil. According to Ford there is no difference in the motor other then the Track pack adds an oil cooler and slightly larger radiator. So my question is how can a car engine have such a wide range of oil recommended from a 5w20 to a 5w50 seems like a real wide spread? Also if the spread is so wide why couldn't you run 5w30, 0w40, 10w40, or whatever grade oil up to 5w50?
You correct, can run what ever grade you want with a significant difference of those two speced viscosities. I would run 0w40 if it were mine.