Does fuel grade even matter?

[jhendrieth]

Is there really a big difference if you use regular, mid-grade or premium in gas mileage? I heard that it doesnt matter if you computer isnt programmed for it.

 

[ak_cowboy]

It doesn't effect fuel mileage unless you're running high compression or other mods. I've noticed a change in mpg when going to Level 2 or 3 with my edge and running 89 or 91 octance.

 

[ex4banger83]

Iv never noticed a difference between them, and I ran all of them from time to time in my old ranger...after trying them all I just run 87 in my truck because its cheaper

 

[LightDuty]

i always run 87. never ran anything else before. I run premium in my snowmobile, but thats it

 

[Old_Skl_Raptr]

i run 89. its only 1 doll hair more per 10 gallons and it seems to make it run a little smoother

 

[Darth Bama]

I just run 87. I may have ran 93 a couple of times, but not often. It's just not worth it.

 

[liter of cola]

i agree with old skl....only costs a buck or so more per so many gallons plus if i run 87 i get this odd noise from my cats....almost like a chinging sound, if i run 89 never hear it...

 

[MHC-F150]

Run strictly 87, with a 93 tank run through it every 4 or 5 months.

I have heard running the wrong octane rating can cause ping/pre detonation or carbon buildupo though.

 

[FLfirefighter]

I run 87 unless i am going to be making a trip then i run a tank of premium just to help burn any thing off the inside, then back to the 87 the rest of the time.

 

[supercrewzn]

87 here also. Ive never ran anything other than that. The only thing that sees 93 is the bike.