Ehat oil in 5.0 synthetic
#4
Senior Member
Mobile 1 5W-20 since first oil change at 1k miles. No oil usage to speak of yet and currently at 4200 miles. Also noticed no valve noise on very cold starts either, used to hate that about my 2004 5.4......
#5
Senior Member
Mobil 1 5W20. I SWEAR it ran smoother the 1st time I ran it. Amazing. Couldn't even tell it was running at idle. No oil usage really, maybe a little, and I do catch a bit in the catch can.