Originally posted by Ziyad:
It all depends on what you want...
higher octane + proper tune = more power



This is mostly true.
The factory programs are for 87 octane and the required ignition timing.
You can program a chip to advance your timing which means using a higher octane gas.
And you can tune out the "slop" from the factory.
But why spend $500 on 5HP.
Wait until you have done some mods and then get a chip to tune your combination.

Frank McCoy aka Mod-deth aka Mid Life Crisis aka SVT Doood aka mcgainer is a SCAM ARTIST Pre98 Zetec - Some Mods