What do you guys run in your car? I just did a tune up and used premium gas for the first time or maybe not the first but I have not used it much and the car felt a hell of a lot faster. I think it was more the tune up but wonder if the gas helped a little. The manual says run 87 and it does seem ok most of the time on it but am wondering if I'm gaining anything by running 93? I have also heard some people claim that you get better gas milage with 93. Is this true? I want to try some race fuel as a friend told me he runs 50/50 race gas and 93 when he races his car and it does wonders but not sure I want to drop $50 for 5 gallons.

 

What I understand is that higher octane is used to prevent engine pinging.

Higher Octane gas is more "stable" then lower Octane gas and burns in a more "controlled" fashion, and therefore is less likely to pre-ignite in the cylinder...

High-performance cars (and most forced-induction engines) run higher Octane gas because the cylinder pressure is greater, so you need to take measures to prevent pre-ignition.

I'm probably way off, just thought I'd throw in my $0.02

 

your car is recommend at 87, stick to it, running higher octane will cause carbon build up over time and mess up your motor down the road. there is no pro in running higher octane for your car. its best if you stick to 87.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lv6l &raquo;</TD></TR><TR><TD CLASS="quote">your car is recommend at 87, stick to it, running higher octane will cause carbon build up over time and mess up your motor down the road. there is no pro in running higher octane for your car. its best if you stick to 87.
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model answer of the month

if you run 93 from day one give it a couple of year, the car will run like crap if you give it anything less than 93.

the compression is too low to take advantage of the higher octane, again, it's not your fault, is called "after mod butt dyno disorder".

it usually happen when you change something on your car, then somehow you think you feel the car is faster/turn sharper/drift better/quieter/louder/harder

 

if there is something wrong that is causing your car to run better on 93 octane, you need to find the problem and fix it. Up untill the 03 model year, Accords could not make use of higher octane fuel since they were not programmed to.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by YeuEmMaiMai &raquo;</TD></TR><TR><TD CLASS="quote">if there is something wrong that is causing your car to run better on 93 octane, you need to find the problem and fix it. Up untill the 03 model year, Accords could not make use of higher octane fuel since they were not programmed to.</TD></TR></TABLE>

Yeah, I've noticed a difference on the 7th gens between 87 oct- and 93 oct .

 

What about if you boosted your car? turbo or supercharged?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kbanks45 &raquo;</TD></TR><TR><TD CLASS="quote">

Yeah, I've noticed a difference on the 7th gens between 87 oct- and 93 oct .</TD></TR></TABLE>

if i remember correctly..the newer cars, like the 7th gen accords...are progremed to take advantage of higher octane fuels by advancing timing, etc., and will automaticly adapt to regular if you choose to use that...if your car, such as our accords, doesnt require premium fuel you will gain nothing from using high octane fuels..this isnt a myth or 'word of the street' its a proven fact...so quit wasting your money, your nto getting any better MPG, anymore power, and your engine isnt running any better...the ONLY advantage i can think of from using premium is getting the extra additives and detergents thatc ome in them, such as V-Power from shell which only comes in there premium fuels...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mangudai &raquo;</TD></TR><TR><TD CLASS="quote">What about if you boosted your car? turbo or supercharged?</TD></TR></TABLE>

then you should have your car dyno tuned to the gas you want to use (ie 87 or 91 octane)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pos_cd5 &raquo;</TD></TR><TR><TD CLASS="quote">

if i remember correctly..the newer cars, like the 7th gen accords...are progremed to take advantage of higher octane fuels by advancing timing, etc., and will automaticly adapt to regular if you choose to use that...if your car, such as our accords, doesnt require premium fuel you will gain nothing from using high octane fuels..this isnt a myth or 'word of the street' its a proven fact...so quit wasting your money, your nto getting any better MPG, anymore power, and your engine isnt running any better...the ONLY advantage i can think of from using premium is getting the extra additives and detergents thatc ome in them, such as V-Power from shell which only comes in there premium fuels...</TD></TR></TABLE>

That's why I'm glad I have a 7th gen!!!!