All i have is header, intake, & exhaust. Does it benefit me to put premium fuel in my car over regular?

 

no not really. all the higher octane fuel does is resist detonation. u need it for forced induction only. u will not see any increase in performance or fuel economy with ur mods. save your money and get the regular.

 

My car actually does worst with premium. I don't know why. I tried it once and it seemed like it was slower and less responsive.

 

it did worst? maybe u got a batch of bad gas. that happens sometimes.

 

Maybe. Never went back to premium after that. My A4 loved premium though.

 

coz it needs premiuim.

 

I know. It was always the good stuff, chevron, never costco, albertsons, or fred meyers. I hated the days when premium was $4+ gallon.

 

costco gas is bad?

 

I just never trust it. It's just my opinion though.

 

only 3 places i get gas at are shell, 76 and chevron and i never have had any problems

 

no, just go with regular unleaded. your tc doesn't need anything higher, lol

 

...unless boosted.

 

costco gas = shell gas

 

76, FTW

 

hmmm..... back on the who's gas is better again?
Most gas in USA is refined by BP (British Petroleum). Isn't it wonderful?

 

what the! ive been using only using premium gas, cus i thought anything lower was bad...sheez talk about a stunner, im a start using regular

 

only time you need to run premium is when you boost or spray

 

costco gas ≠ shell gas

 

ummmmm Costco gas does = Shell gas

well it all depends on what your local suppliers are.
in most cases there are only 2 or 3 distributors of gas in your area...in which most cases your getting the same gas regardless of where you go.


https://www.scionlife.com/forums/vie...303&highlight=

 

its because premium/higher octane gas takes a lil more time to burn than lower octane gas.. Higher octane requirements on some cars are seen usually on higher performance cars or high output engines, its coz due higher compression or aggressive power output it makes the car more prone to knock/detonation.. As mentioned higher octane gas reduces chances of knock coz they burn a bit slower, reducing chance of preignition or uncontrolled combustion..

and oh premium gas usually have more additive that helps clean up your injectors/fuel system.. I say shell FTW