I had a recent post here about motor oil,, it seems pretty wide open as to what guys do,,, my brother-in-law asked his Ford mechanic pal about this oil thing, his reply:
"I talked with the friend of mine that works at the Ford truck garage. He said there has been a memo on the oil issue you were talking about. If the cover on the oil cap says to use 5W-20 you must use that weight oil. The new motors have such tight clearences that in the winter the lifters will pump up and the motor won't run right, if you use 5W-30. He also said that at their shop they have a really good price on Motocraft oil, so if you checked your Ford dealership maybe they do too. He said Motocraft oil is made by Valvoline."


My local hardware store guy ordered me a box of Mobil 5w-20, he said it wasn't any more $$ than the mainstream oils,, then another guy in town, a general repair mechanic, with a year old Excursion, said he uses 10w-40. As long as I can get 5-20, at a decent price, I guess I will use it,,,,,