Originally Posted by novus
So I've read in here that Mobil1 isn't true synthetic. I've been using it for some years now in my truck. If this is the case, what is recommended? I also see people running 5W-20. I haven't ran out to the car to grab the manual and read, but I will soon. But back to the main question, what's the recommended oil? Motorcraft?
Any oil that meets Ford spec WSS...945 (see your manual) is fine. And Mobil1 5w/20 is one of those.
There are precious few synthetics in the US market based on the old definition of a synthetic, Amsoil being one. However, Mobil, Valvoline, most Pennzoil, Quaker State, Castrol, etc. synthetics are made out of crude oil subject to extra steps in the refining process. They are of higher quality than conventional oils and perform better in extreme conditions and are capable of longer oil change intervals. So is Mobil1 as good as a "true" synthetic? Just about, and at an affordable price.