What Do I Do

[mental_image]

I am in the process of swapping a b16 into my 95 civic DX. The thing is I have 1/3 tank of 87 octane gas in it. If I fill it with 91 octane will it still be OK or will I have to put some octane boost in it as well to keep the octane level where it needs to be? Thanks a lot.

 

[D See 2]

which means you'l be running 89.6666 octane which will be fine until your next fillup.

 

[E_SolSi]

should be fine
if your paranoid just drain the tank

 

[sooboss]

really was that a question.. octane booster..will be fine also