high octane gas

[99 eclipse gst]

I have a question. Is there anything you need to do if you havent used high octane in your car? Or can I just pump it in with the reg gas thats alredy in there? Also is there anything I can put in with it to help clean it out and that?

 

[2gmummy]

What kind of high octane? For e85 you'll need a fuel system upgrade and a soild tune at bare minimum, id say the same for any other preformance fuels. If you just want to run the highest octane as your local gas station (which you should aready be doing) then you dont have to change a thing

 

[98blackeclipse]

you dont need to upgrade anything to run high octane gas. high octane gas will allow you to run more boost and to advance timing to get more performance. running more boost heats up the incoming air and you run the posibility of detonation. higher octane fuel eliminates the posibility of detonation if tuned right. but of course you dont really need race gas (higher octane fuel) unless your running over about 20-25psi