AllShowNoGo

For all that dont know i'm new to this site and to the LS1 community and have a very newbish ? what gas do i use? Can you use the cheap stuff, or do you have to use premium, or can the mid-grade stuff work well? I have no idea and i dont want to put shitty fuel in my car and wreck stuff, so any help would be appreciated.

ChocoTaco369

you have to use at least 91 octane. here's the thing about octane: it's not a performance booster but if there isn't enough, it destroys performance.

your PCM is tuned so if you use less than 91 octane, it reduces timing in order to stop detonation (explosions inside your motor due to too low of an octane). octane SLOWS DOWN combustion. since the LS1 is a high compression motor, it combusts faster. it blows up inside on less than 91 octane because the compression is so high...unless the PCM retards the timing, resulting in a big loss in power.

you need 91 octane to keep this from happening. so what happens if you go 93? will you see better mpg and more horsepower? no. octane is NOT a power adder, it's a detonation supressor. there is no point in buying above 91 octane unless you need it (unless it knocks with 91 octane). anything above 91 octane is a waste of money. that being said, if there's no 91 octane in your area, 93 is dandy too.

AllShowNoGo

All righty then, thank you very much that is all I needed to know, BTW if it helps I only fill up at BP stations, i dont know why but i can never convince my self to fill up anywhere else.

ChocoTaco369

that's fine. FWIW, i'd try to find gas that uses no ethanol. test each gas station locally. see what brand it runs on best. all gas is supposed to be relatively the same but other people have better luck on one brand more than others, don't know why.

BigDaddyZ28

When you do find your LS-1 car, It should have a sticker on the back of the fuel door that says 'premium unleaded fuel' or something similar...

If you do not see the sticker, ask the owner where it went...

Sometimes when people get in accidents, The body shops do not always replace the stickers and NOT seeing that sticker there could indicate that the car was previously damaged and then repaired (less the OEM sticker).

You got to watch out when buying a used car.

Hope I helped some friend...

BayAreaSS

iTrader: (10)

LS1's use premium. Dont hurt your engine with bad gas

PEWTER SS

Doesn't the instruction manual and the sticker on the gas door tell you what to use? Maybe only my LS1 does.

mcgodx

You should run 91+ in it. However, most automobiles nowadays will be able to run on 87 in a crunch (or even indefinitely, although at less efficiency). I read somewhere that high performance cars are usually more economical to drive using high octane fuel (91 or 93, depending on the area) than to use 87, because of the loss in power and thus gas mileage. I don't know how accurate is, and I have a feeling it also depends on driving styles, but if you can, always put the recommended octane in the car.

AllShowNoGo

Thanks for the help guys, i will check tomorrow to see if the fuel door has the sticker or not, i just wasnt sure on what to use and if was safe or not.

Xx01CamaroZ28xX

iTrader: (1)

Use 91+ octane only.

GTObsessor

iTrader: (2)

Hmm... BP stations... as in ARCO... ummm... you really must not like your engine much... your car though... only Chevron for my baby.

00454sscamaro

you crazy? bp's the best in my book. many speed shops recomend bp as the best "pump" gas you can get. and my dirtbike can attest to that. it has much higher gas sensativity/ higher compression then any car ive owned.

King Nothing

iTrader: (9)

yeah chevron for me all the way!!!! go with 91+ and thats it . . . . unless you want a new engine not by choice

jlashley2001ss

iTrader: (5)

i always thought Shell 93 V-power gas was the best

GeArBaNgEr56

iTrader: (1)

**** the last couple of fill ups, I've just put in regular unleaded. Is it ok to go ahead and add premium to it, or should I wait untill im on empty and fill it up with premium?
Thanks

YellowMonster87

iTrader: (4)

Shell was voted the best gas available when comparing there V power 93 to BP 93, and other surrounding competitors. The added detirgents in the V power not only clean your engine but in doing so help increase mpg with less addtitions of carbon build up.

jus my .02 but i have done comparisons between 91 and 93 and i average with the same driving and weather conditions in between 3 and 6 mpg better with v power vs. any other 91 octane fuel.

nothing touches my tank except for v power and if i run out then ill go get a gas can and have someone drive me to shell to get a gallon of more v power!!!!

ChocoTaco369

no...put premium in ASAP. try and get the highest octane possible (93 or 94) in order to raise the overall tank's octane to 91. and slap yourself for being cheap. if you wanna buy regular gas, sell your car and buy something that takes regular. not trying to be mean but regular should NEVER enter your tank unless you're in new mexico or somewhere where the highest octane they have available is ~87.

GeArBaNgEr56

iTrader: (1)

Thanks man

ebear

I use 93

ChocoTaco369

np treat that LS1 good, it's been good to you so far. that's how i look at it. it gets me to work every day in a stop-and-go commute at 22mpg. in return, i give it premium gas and $40 oil changes. we have a good relationship