Well I recently got back from a month in New York and I couldnt wait to drive my truck. I got home jumped in, let her warm up, then opened it up really good. At about 5,000 RPM I heard the engine knock really loud. I let off really quick and then called and asked if they had been putting 87 in my truck. They told me yes and that they had run about 2 tanks of it in there since I had been gone. I was really mad about that to say the least. Since the trucks fuel was already at 1/4 tank I dropped 3 bottles of octane boost (who knows if it helped) and filled the rest up with 93. I havent gotten it over 4 grand and am waiting until the next tank of gas so I can have 100% 93 in there. I am just hoping that nothing major is messed up with it now. The only good thing is that the person who was driving it, drives like a grandma anyway, so maybe they didnt hot-rod it too much.

 

shoulda just put like 5 gallons or so of unleaded race fuel... like 104 oct.

those octane boosters cost alot.

 

You did the right thing, let off and increase the octane, if that's all that happened I bet it's fine, and good thing the other driver isn't a racer!

let me know how it turns out.

later,

allen