Racing Fuel

[cdssolara]

100 octane won't hurt your car, but unless your car has a really high compression ratio it won't really help it, either. Octane is just a measure of resistance to spontaneous combustion, or knocking. The higher the octane, the higher the compression it will take to make the fuel spontaneously ignite. If you've raised the compression in your engine a lot by adding a supercharger with a small pulley, you run a much higher risk if knocking, so going to higher octane fuel is necessary. Putting 100 octane gas into a stock engine that only requires 87 octane fuel is just a waste of money.

[Stock Solara SEV6]

100 octane won't hurt your car, but unless your car has a really high compression ratio it won't really help it, either. Octane is just a measure of resistance to spontaneous combustion, or knocking. The higher the octane, the higher the compression it will take to make the fuel spontaneously ignite. If you've raised the compression in your engine a lot by adding a supercharger with a small pulley, you run a much higher risk if knocking, so going to higher octane fuel is necessary. Putting 100 octane gas into a stock engine that only requires 87 octane fuel is just a waste of money.

I agree. In addition, higher octane fuel burns SLOWER. So with a stock motor and computer set up, you should see a DROP in performance. Like you said, unless you have ultra high compression or running tons of boost, you will not see any improvement. Save your money.

[Grazi07]

Geez, I don't think I've ever seen a station with that level of octane.

[Mole]

100 oct gas pumps are rare, however in CA is sold through 76 gas stations.



fyi, Lake Havasu sells 110 octane.

[Parke10]

110 here is normaly about $4.00 a gallon unless u buy the 55gal dumb then its like $3.00 highest iv evr seen was 127oct at a lake pump it was like $7.75 a gallon

[DatSRBoi]

so if the recommendation is 87 and im all stock, will 93 octane hurt my car? ive been doing that for weeks now. other then that i needa get a fuel guage that tells u if its too lean or rich..helps allot to know the exact.

[/img]

[Mole]

running 93 oct will not harm the car, however you may encounter lower gas mileage.

the benefits are
better acceleration response,
cleaner burning and
easier to pass smog laws (if you have any.)

each car can vary. this is from my own experience.

[DatSRBoi]

OOOOoo ic ic thanks..Ima go back to 87 then haha since i need that milages. Also abuot this smog dealio, will having an exhaust muffler on it make it fail the test? its an OBX muffler..Cuz if it does..ima get 116 octane hahah maybe ill pass it.

[Mole]

having just a muffler won't do anything to the sniffer.

you still put out the same amt of emissions, since you didnt tinker with anything hardcore.

[Vi3tT3kNiqz]

I always put 91 octane in my car. Does that help of hurt my car? I need to know if this is a myth or not. I've been told that mixing 87 and 91 is better for ur car. Is this true?

[cdssolara]

so if the recommendation is 87 and im all stock, will 93 octane hurt my car? ive been doing that for weeks now. other then that i needa get a fuel guage that tells u if its too lean or rich..helps allot to know the exact.

[/img]

If you're all stock, you don't need an air/fuel gauge. Once you start improving the airflow you begin to run the risk of getting too lean, which is when they start to become useful. Even then, most air/fuel gauges don't really give you good info, unless you're hooked up to a wide band O2 sensor.

[cdssolara]

I always put 91 octane in my car. Does that help of hurt my car? I need to know if this is a myth or not. I've been told that mixing 87 and 91 is better for ur car. Is this true?

It definitely does not hurt it. It probably doesn't help it, either, unless your engine is knocking for some reason. Save your money and stick to 87 if you're stock.

[DatSRBoi]

OOoo..ok ok one more question.. I dont get whast too lean and too rich?

[Mole]

too lean- prone to knock or pinging. (nothing beneficial here)

too rich- waste of gas and possible cat clogging. (if you're straight piped, a fireball can be made.)

[Jaimster]

too rich- waste of gas and possible cat clogging. (if you're straight piped, a fireball can be made.)

Fireball! Cool, like on Fast and the Furious?