clemsonfan1992
Full Member
I have a gas question. Can I run MidGrade or premium in my avalanche? Just to give it a lil more power. will their be any problems if i run a diffrent octane gas?
I have run all grades in my 06 LS 5.3, so no real difference in mileage, maybe idles a little better with the 89, and 1 mile per gallon better, not worth the money. I hear all these stores about ethanol being bad, but I had 177k on my 01 5.3 short bed before a hail storm trashed it with no issues, didn't burn any oil, have always stuck with Castrol Sythetic. My 06 now has 127k, and no issues , runs like a champ and no oil burn between changes.Dupont 24 said:I use 87 octane with no problems at all.