93 if I have to....100 preferred.

 

owned the car since i was 15 years old

never once ran anything below 93 octane

i treat it good , it treats me good

 

Always premium. 92 or 93. I tried 89 one time just to see how it performed. Needless to say, thats the last time I'll put anything other than premium in my LT1. That was well over a year ago.

 

None of you guys must live in CA because all I can find around here is 91. The only thing i could do is drive to sears point the local track every time I needed gas and hope that they dont have only 110 plus.

 

whats weird, is that i never noticed a difference between 93 and 87

 

We used to get 92 here in California but now you have to deal with 91 from the the regular gas stations.

Z~

 

Same here, I use to put 92 in my car when it was still around in california, now I put 91 only.

 

I wish we had a Sunaco station around here! Maybe i'll go to there website and look for the closest one...

I run nothing but shell or amaco 93 octane

 

I use 92 octane in the warmer months, but then once the high temps of the day stop going above 50F, I switch to 89 octane. These engines don't get spark retard on 89 octane in cool weather (I verified this with Scanmaster)

 

i agree with jasons93z....also i've heard of sunoco putting a sh*tload of water in their gas...some guy that worked there forever told me and my buddy that...

 

I bought mine new in 94. Never put anything above 87 in it ever. Never had a problem. Power low? Maybe, I dunno. When gas comes down in price, I should try 93 and see if I notice a difference.

 

I was told when I got my car never run less than 91 octane due to compression. This guy is an LT1 expert and knows what hes talking abot.

 

See Sig
Most of the 87
I save money, so I can buy Beer

 

tried 89 once, she didn't like it. Only 93 for me from now on.

 

Never put anything lower than 91 octane in my Z. I've found a few places around town that say 92 octane on the pump. But I still need to talk to the manager/owner to find out if it's really 92. Or if they haven't change the lable on the pump.