5Liter Import Eater

Does anyone recommend a certain fuel for a 93 gt. currently using sunoco 94 octane just wondering if its worth the money. do some stations have worse fuel than others, does it matter which octane to use. just wondering?

mdvaldosta

run 87 unless it pings there

bluepony1

91 5.0 auto if i run 87 i get **** poor milage but if i use 93 my milage is better and i run shell v-power

sup95cobra

I would just run 91-93 unless you are spraying a shot over 125

ho85GT

I wouldnt recomeend using Arco, makes my cars run different.

tyybo

K uh, i dont wanna get into the chemistry of fuel unless i have to. but unless you are turbo or blown and make real high compression.. High octane fuel is NOT nessasary(sp) Find a place that you are pretty sure dosent have watery gas or anything and just put in regular unleaded. or ethanol if it gets cold like here in north dakota

2004and1966

I was told by a builder that cheep gas can cause detination damage on MOD motors but pushrod ones just run as good gas as you need to keep the pinging down.

bobby

i have 12* of timing right now and when i was at a lite with 89 octane, if i listened REAL closely i could hear some pre detenation, pull into the gas station filled up with 93(phillips 66, i like it the best and no more, ran smooth as hek! and it ran even smoother once i put amsoil in it!

cepowers18

yeah, I used to run 93 octane all the time... then it got really expensive with rising gas prices. so i just went down to 89 and it seems to work about the same as far as performance and gas mileage go. I get exxonmobil gas, occasionally i'll get shell.

C/Note

i run 92 chevron i my 99 cobra...and in truck its got 10.7 to 1 and diesels when i shut off in gear now...[:@] not making gas like they used to...C-16 gas in my 408 12.5 to 1