I have spoken to a few local folks who have the 5.7 Hemi engine and they all recommend putting in the highest grade fuel available. Here in Ca. it's 91 octane only.
I looked though the owners manual on my 2003 Dodge truck and did not any mention of using 91+ fuel.
Anyone got any opinions on if 91 will do better for overall performance than 87 will or is this just a personal preferance??
