Engine Oil
4.2L V6, 4.6L V8 and 5.4L V8: Ford recommends 5w20 semi-synthetic for all of them. Many people who have turbo and supercharged these engines opt for 5w20 or 5w30 full synthetic.

This is just a tiny start (very tiny, lol), as others add to this thread I will incorporate the information here at the top.

 

I plan to get stickies up for the other sections so we can add information like that to them, same as the one here in the 2004-2008 F150 section.

 

I wouldn't automatically assume it, while synthetic resists oil shear better than non-synthetic, which helps it under pressure and slows viscosity break down.... oil can only hold so much combustion by-products before it becomes an issue, and the additive package can only do so much before it depletes. That's why its generally recommended to do occasional used oil analysis sampling to see how the oil is holding up.

Companies like Black Stone Labs do this and will let you know about how far out you can go with your particular vehicle. So the first time time around you're going to pay more since you're sending in samples to Black Stone, but once you know how far you can go, you won't need to pay for this.