will it do anything bad?
 

So here's the deal.

MY car is completely stock. And it has about 1/8 of a tank left in her.

I wanted to try to put a few gallons of premium in her to see what happens.

Should I? Is it safe? Will my timing be really bad? Will it misfire?

Will I notice a performance difference???

-thanks

RE: will it do anything bad?
 

:eek:r u serious?

Gas is gas unless you have a tune for a specific octane. You can put higher octane automotive street (87-93) gas in without a tune but you will not get any performance gains. Just some weight loss in your wallet.

Just don't put dieselor leaded gas in and you're fine.

RE: will it do anything bad?
 

^^^What he said!!^^^^

RE: will it do anything bad?
 

+1

RE: will it do anything bad?
 

do you guys always use regular?

Well, there are higher octane fuels which have a higher flashpoint to retard the timing in high preformance engines. Thats why racecars use racing gas. So I figured that putting premium may change the timing alitttle....:eek:

RE: will it do anything bad?
 

I've never used regular gas. Always premium (I'm in CA so its 91 Octane) even when I was stock. Now I'm tuned for 91 Octane and I love it!:)

RE: will it do anything bad?
 

There should have been a place on the list for: am I wasting my money? Because seriously, unless you have a tune for it along with a new intake of some sort, its not worth it. Some people use it to use it and I guess they dont mind wasting the money, but get an intake and tuner and then get a 91 or 93 octane tune.

RE: will it do anything bad?
 

If you don't have a tune for premium, its ok to use it ocassionally. It helps to keep the engine clean.

RE: will it do anything bad?
 

wow, thats all I have to say

RE: will it do anything bad?
 

How exactly does it help to keep the engine clean? The octane rating detemines at what point combustion occurs. Say we have a car that's tuned for 87 octane. Its my understanding that 93 fully combusts at a higher point than 87 does, thus leaving miniscule particles behind. Those particles don't really have a noticeable affect on performance, but I would imagine after 100,000 miles or so, there might be some buildup... I could be wrong though..