SLVR_99-Z

If this is in the wrong thread, I'm sorry. I'm new here. On to the question. I just picked up a 99 Z28. Of course it has the LS1. What are you supposed to run for gas in this engine? I assume premium (~92 octane here) but most of it around here is labled "non-oxygenated- for collecter vehicles, boats". is this what I should run or should I drop down to super (~90 octane). thanks for the help. sorry so long.

Cliffs notes:
what octane gas? premium says "non-oxygenated"? HELP.

HeapaShifter

iTrader: (2)

The best place to look would be the owner's manual if your car came with one.

You should run 93 or 91 depending on what area you live in. (Some states don't have 93.)

SLVR_99-Z

didn't really think about that. i currently do not have the owner's manual. it was forgotten with the sale so i need to go pick it up and the soonest i can meet the guy is mon. good idea though. thanks.

blue01ta

iTrader: (4)

I run 93 in mine.

chewy99ws6

iTrader: (8)

I use 93

00transamnh

iTrader: (1)

everyone is going to tell you 93+

have fun with your new f-body

lowchevy2go

iTrader: (4)

i also run 93

98 Raptor TA

iTrader: (9)

I did some reading up on that non-oxygenated gasoline, and it looks like that is basically "normal" gasonline. Oxygenated gas is what they're starting to use in california and big cities, it burns a little cleaner but supposedly makes your A/F ratio a little leaner. So it looks like the non-oxygenated would be better to run cause it wouldn't lean out your A/F.

SLVR_99-Z

thank you very much White95. that is what i was looking for. i knew i was going to hear 93+ from most people, just wasn't sure about the non-oxygenated thing. i guess i should have been more clear on that. thanks to all who replied.

SVThis

iTrader: (2)

i run 89 (im cheap)...runs just fine though

freakynipples69

iTrader: (3)

no less then 91, 93 if available

DuronClocker

iTrader: (25)

I'm running 93 in my car, but my compression is around 11.1 or so. I don't think I ever ran anything less than that before the modding though either.

ChocoTaco369

an LS1 with stock compression requires 91 octane. due to your ECU's fuel tables, it will run poorly/lose power if you put less than 91 octane. however, it will NOT GAIN POWER or run any better OR GAIN FUEL ECONOMY if you put in anything above 91 - THIS IS NOT DEBATABLE, it's science. anything else is a waste of money (unless your car pings on 91 for some reason).

octane is not a power adder. it is a detonation supressor. use 91, it's all it needs. anything else is a waste of money.