okay, trying to see if i've got phantom knock, so i'm going to try race gas. I found some 109 octane stuff, and i've got about half to three quarters of a tank of 93 in the car right now. would 5 gallons of the 109 be enough to add to it, or do i need to run the tank down more first?

 

I think it would be best to run the tank down some more, that's a lot of gas and it might just dilute most the effect of the 109 (will still bump your effective octane tho)

 

If you take it to half and add 5 gallons of 109 you get a 97+/- octane mix. That should be enough to see if it's phantom or not.

 

You could always just drain the old fuel out, there is a drain plug on both sides of the tank. Makes it easy to do your fuel swap that way. No need to mix it really when its so easy to drain. My .02

 

That's wasting gas lol. I'm just gonna run it down more then mix it up

 

why waste it? im sure you could find a suitable container for it for the mean time

 

Yeah, what did you think I meant drain it on the ground c'mon now

 

it doesn't work like that FYI.

 

well i went with about 5 gallons of 93 in the tank and dumped 5 gallons of 109 on top of it. new logs with and without the juice are in my knock knock thread.