Recommended full synthetic oil

[schISM]

I’ve been using Mobil 0W40 for the last year and a half with pretty good results. Still dump it at 15,000 and if you buy it at WalMart it’s around $4.57 a quart vs. $3.25 for rotella. Before the demandate it stayed cleaner longer(3000 miles) and cut consumption to near nothing. The API certs. are SM, SN, SL, & SJ. so if Detroit is requiring the new FA-4 cert. oil to be used you may wanna stick to the 10W30 synthetic blend at least till the warranty is done.