i just bought a 99 gs and i wasn't exactly sure what i should put in it. im thinking regular but something in the back of my mind says premium. it didnt come with an owners manual and it doesnt sat on the gas cap or anything so i was just wondering. thanks

The N/A 420A will run best on regular low grade gas. You only need the good expensive shit if you have boost, NOS, or some other crazy ass engine work done. Regular is just fine for a stock N/A 420A engine.

I use 89... I have a 95 Eclipse GS

dont waste your money. the ecu is smart and will realize the higher grade gasoline, but not affectively increase the performance.

with this on everybodys mind, what is the benefits of using an octane booster while n/a????

Nil. Just like using 93 octane while NA - doesn't help you.

so i should go lower then 89? what do you guys use?

higher octane is supposed to help prevent clogged injectors and keep it cleaner. I dunno. I use 93 octane premium and always will.

> higher octane is supposed to help prevent clogged injectors
>and keep it cleaner. I dunno. I use 93 octane premium and
>always will.


ALL FUEL cleans injectors as long as it is a brand name fuel. 93 octane burns slower and thus is not the fuel you should use in your vehicle. YOU ARE THROWING AWAY YOUR MONEY AND ALSO NOT HELPING YOUR CAR'S ENGINE. BEST performance with 87 if no major mods such as Turbo, NOS.,etc. You may thing you feel a difference but it is all in your mind.

haha I used 92 octane when I was octane haha becuause my parents paid for gas. ONly the best for my baby haha, unless it was me paying haha. But yeah you can use low octane, car seems slower when I did though, just me thinking stupid I guess. ONce in a while pour some Techron concentrate in your tank to 1- get rid of water in your fuel system, 2-clean your fuel system, 3- clean your combustion chamber.

My auto tech teacher sez that it has been scientifically proven that techron does those 3 things. if he approves it I do too ! FREAKIN expensive shit though! :(

i used to use 93 and my car started acting up. took it to the dealer and they told me not to use high octane and just use 87 cuz "thats what it says in the owners manual"

The computer is tuned to use the lower grade gas in the rs/gs. I actually get better gas milage when I use regular 87 grade gas. When I had my new engine put in a couple of weeks ago I asked them when I left and they said 87 works best with this car.

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wo0t!
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i have always used 87, but soon im gonna need higher octane