Re: For 5.7L HEMI: what octane rating of gas do you use?
I'm confused. In the back of my 2013 manual, the manual recommends 91 octane for my 5.7L engine. Many of the posts say 89 octane. Is that for the V6?
2013 Jeep Grand Cherokee Overland
5.7L V8, 2WD, AFE Dry drop in air filter, Quadratec mats, Sprint Booster, Volant CAI, and Blastinbob's axleback exhaust and a X-pipe
Build date: 9/4/12
Bought 01/27/15 with 47,200 miles