I wonder what Valvoline does different?

[austin92]

Could someone explain a little on the CI vs CJ oils?


1983 f350 6.9 zf5 2wd srw single cab long bed. Facet duralift, optima red tops, bfg all terrains, 4" exhaust from y pipe back, autometer z series pyro, pump turned up 2 flats

 

[DaveBen]

Google "engine oil ratings" and you will find several sites that will explain they ratings. I like www.bobistheoilguy.com for general education on all things oil.