Regular vs premium gas Options

[valerit1]

Hi,

Does premium gas REALLY make a mileage difference in 5S-FE?

Reason I am asking - Toyota does strange things: from our owners manual, two engines are
avialable - 7A and 5S. Regular for 7A and premium RECOMMENDED for 5S.
BUT - if you look at the, say 95 camry manual - two engines are offered -
5S as base and 1M (3.0 V6). Now, what is funny - for camry for 5S (base)
regular is recommended and premium for 1M. BUT these are ABSOLUTELY
the same engines - 5S for camry and celica! Toyota just sets - regular
for the base engine and premium for upgrade! Does it make sence to you?




Val

[Bitter]

same engine, different PCM tune possibly. that is odd. but hey, theres been other fudges. my prizm manual (much information is right from toyota in it) says 91 octane for the 7afe!!! they didnt explain that thats 91 octane on the RON scale, not the PON scale you see at the pump.

[jcbass7]

so am i supposed to be running premium in my celi GT? I'm swapping in a 3sgte soon what do i need to run with that engine?

nvm about the GT part, just read the gas price thread.

This post has been edited by jcbass7: May 3, 2006 - 5:59 PM

[CelicaZR]

I've also ran my on Premium Unleaded (98 Octane).
Its also recommended by Toyota here.