jbucklin

Or, that is, a 93 tune?

siggyfreud

You CAN use Regular, however the car will reduce the amount of power it makes. If you want the most power, you should fill up with 91 Octane.

A 91 Tune, is an aftermarket tune that requires 91 octane fuel. A tune tells the car's computer to work differently in order to make more power, but requires a certain grade of fuel to do so.

Premium fuel's octane rating varies by State. In Oregon, it's 92 octane. In some states, it's 91, and in others, its 93+. Many states put Ethanol in their fuel.

Ethanol, though it lowers your MPG a bit, raises the effective octane rating. That said, I don't know if 92 octane with 10% ethanol means its 92 octane WITH the ethanol, or 92 octane gas before the ethanol is added.

jbucklin

Thanks Siggy. Very helpful info there.

Falcon Fixer

Big Deal.
So what.
Two and one half PERCENT.

Andy13186

The same can be said about the price of the fuel..

pay 3.41$ a gallon or pay 3.69 a gallon, only a few percent difference in price for a 10 hp gain . well i guess its about a 7.5% difference in price


But i think its worth it to me to pay like 2-3$ more per tank to have 10 more hp and have the car running like it should be

TRexGAWD

What's your point? O.o.. A loss is a loss..

jbucklin

So, let me get this straight: does the car need the after-market 91 tune in order for it to get the benefit of using 91 or 93 octane? I just filled up with 93 and I am pretty sure this car has not had that 91 (or 93) tune. Will I notice an increase in power?

siggyfreud

No you don't need a tune for the car to benefit from 91. However, a car will benefit greatly in terms of power from a 91 or 93 specific tune.

jbucklin

Okay, one final question: how much does a 93 time cost on average?

jbucklin

That would be: how much does a 93 TUNE cost?