What grade?

[Chump]

What grade of gas do you guys use in your sixers?

 

[g36 monkey]

87 is all you will need if you are not supercharged or turbo'd.

however, I am going to be getting tuned for 93 to advance the timing a little more when I re-tune with my long tubes and no cats.

 

[JRad405]

87 for me because I see no point in spending more for the little power I would probably create in my case at least. I DD my car too so it just would make it worse on my pockets. I only run 93 when I go to the strip with the canned tune from Bama.

 

[robb15033]

You need to use 87 octane in a stock car. When a SCT tuner is using created files then that changes.
If you use 87 octane and have pre-combustion issues or performance issues, most probable cause is dirty upper intake (Seafoam it!) or ignition coil/spark plugs.

 

[stangdriven]

i use 91 oct.. im also sct tuned .. and i love it...

 

[MadStang]

now that e85 has become more readily available if I still had my sixxer I'd be running a high compression e85 motor lol

 

[Chump]

Yeah I was just wondering if I used premium if I'd make more horse power.

 

[945.0]

Yeah I was just wondering if I used premium if I'd make more horse power.

not enough to compensate for the extra cost. i always run 93 in mine it runs better then using lower grade fuel here. will be going to e85 when i do my build in less then a month

 

[MadStang]

Yeah I was just wondering if I used premium if I'd make more horse power.

you won't make more power just from running a higher grade fuel. you need to be tuned to take full advantage of the extra octane the fuel will provide.

 

[MustangChris]

i put in mid-grade, as that is what my owners manual told me to put in (87 octane)

no need to put anything higher without raising compression or adding a power adder.

i would put in premium when running injector cleaner, as well.

 

[MustangChris]

you won't make more power just from running a higher grade fuel. you need to be tuned to take full advantage of the extra octane the fuel will provide.

This is fact.

 

[stangdriven]

that is true... bout the higher grade fuel... ill back that up also... gotta tune for the full advantage.. besides having higher compression...