Originally Posted By: zogg
I just bought a very pristine 2005 f150 4x2 with a 5.4L v8, and 91,000 miles.
I intend to use an FL820s motorcraft filter, but I want to use a synthetic 5w20 or 0w20. I am thinking about Royal Purple, Kendall Gt1 full synthetic, or open to suggestions. The truck is in...