ty_ty13

iTrader: (42)

i recently cut some 110 octane (5 gal) with 93 octane ( 10+gal) now service engine light on...im guessing its b/c of the gas...what codes will i see if tested...and is it bad for the ls1?

T/A Medic

iTrader: (1)

110 oct is a leaded gas probably. you just killed your O2 sensors.

BADz2ATE

I have ran Turbo Blue in my z28 before with no prob. that is 115 octane and smells like methanol. i have had no probs with it. high octane shouldnt hurt it.

Mike

technical

lead fouled O2 's

383LQ4SS

iTrader: (33)

Lead fouled 02s
Get the code and Im sure it will point at the o2s.

zchgla

whats the highest octane that should be used in our cars?

technical

It's not the octane, it's the lead. The highest unleaded gas I've seen is 100, at least in PA.

Pro Stock John

iTrader: (34)

leaded up 02's...

They might clear up with regular gas... if the code persists you might try cleaning the 02's...

BADz2ATE

hm that is strange, nothing happened to mine when i ran 115 in it. oh well, good luck on the prob, sounds like O2's

Mike

383LQ4SS

iTrader: (33)

If you have brand new 02s you can sometimes get away with it. But older 02s that are half clogged anyways seem to foul very quickly. I had a set that fouled in 25 minutes of driving. Its also exacerbated by the fact that when you use 110 octane on your normal tune you will usually be running MUCH richer so the mixture doesnt burn completely. This is especially true at idle and part throttle.

So just stick to 100 octane unleaded. I know they do have 110 unleaded but I havent been able to find a plce locally to buy it.