xdrian

I searched all over the forum and found nothing about this. Has anyone ever tried race gas in their 8, or planning on doing so. Also can someone explain the advantages and disadvantages of using racing gas?

Snoochie

well if you're talking about higher octane fuel don't do that. You get most power at the lowest octane without detonation. Using 87, 89 or 91 is perfectly fine in our engine unless you happen to have a turbo then you better stick with premium. There's no need to go getting jet fuel in our cars

brillo

alot of race gas is leaded gas, so you better not run that with your cat on the car.

therm8

damn oil companies have 99% of the world conviced that higher octane is better

race gas is for high (and i mean high) compression engines, or engines running a lot of boost etc. It'll keep you from grenading an engine like that. Higher octane = harder to burn, so you'd either notice no difference or a loss of power, in my opinion.
Try a search for Xylene (i think it was). Big discussion some time ago about the benifits of high energy fuels.

rotarygod

I still don't know why people run anything more than 87 octane in their RX-8's. The nonturbo rotaries have always run best on the cheapest lowest octane stuff you could get.

The advantages of race gas can be debated for certain applications but for your stock nonturbo RX-8, there are no advantages.

The disadvatages will be very obvious. First off it costs alot more. Second, you'll get far less power than you will with lower octane. The burn rate is too slow and it also takes more of it to get the same energy out of it. You'll get a rougher running engine and worse gas mileage. In order to make race gas work effectively on a nonturbo engine, you need to design the engine around it. Higher compression is one thing to do but the ignition timing and fuel needs are also totally different in their tuning.

Save your money and your time. Stick to regular.

Overport

you can run race gas fine if you take off the cats. its leaded.

xdrian

i used to put 87 octane in my car until i took it over 8500rpm, my engine check light came on and my car and my engine seemed to stop working for a second. it happened to me twice. i was told that it was from the lower grade fuel, so now i pour in 93, and it stopped doing what it did.

i always thought that higher octane burns faster, thnx for clearing it up !1