I went a bit overboard and purchased 48qts (8 cases of 6qts) of 5w20 to use in my 2016 F150 5.0l and my father in laws 2017 F150 5.0l. 5w20 is the recommended weight. After a lot of reading it appears that a lot of F150 5.0l owners are getting better results with 5w30 and 10w30 motor oils...