what grade gas do you use ???
Le Mans Master
Joined: May 2003
Posts: 5,362
Likes: 3
From: Delray Beach FL
Re: what grade gas do you use ??? (OleDog)
I tried last week to go with 89 octane. I don't know if I got a bad tank of gas or what, but it was stumbling something fierce once the Vette got hot. Went back to 93 octane. It dropped in price this week, $2.13 down from $2.18.
Burning Brakes
Joined: May 2004
Posts: 1,182
Likes: 14
From: POINT PLEASANT NEW JERSEY
Re: what grade gas do you use ??? (speee)
DUDE!! Do yourself a favor, stay with the high octane 93. I also have found that for some reason my 86 pings like a bastard only if I put exxon in her so thats a no no in this house. Must be something in thier formulation. Now Mobil super gives me no problems whatsoever and Exxon&Mobil are a merged company...so I guess the gas is different.
Just out of curiousity has anyone else had a simillar problem with Exxon
and Pinging or for that matter any other brand gas?? Keep motorin' :steering: :seeya
Just out of curiousity has anyone else had a simillar problem with Exxon
and Pinging or for that matter any other brand gas?? Keep motorin' :steering: :seeya
Melting Slicks
Joined: Aug 1999
Posts: 2,619
Likes: 1
From: Whidbey Island Washington
Re: what grade gas do you use ??? (bronx69)
I read somewhere (think My owners book) that the ZR-1 has a feature that you could use any octain and the computer adjusts the motor to run with whatever without engine damage. This was a standart part of the LT5 package because the ZR-1 was designed to be an "International Car" and octain ratings vary greatly from country to country.
I asked Cadillac about that and why that is not included as part of the Northstar package with no intelligent response! I do mix high and mid rated octain in our Northstar with no problems. It'll not run on 87 octain without pinging. Both the Cad and ZR-1 get fewer MPG and loose power with lower octain gases. Go figure why the General could make it work on the ZR-1 thirteen years ago and not have it as a standard in current models. :rant:
I asked Cadillac about that and why that is not included as part of the Northstar package with no intelligent response! I do mix high and mid rated octain in our Northstar with no problems. It'll not run on 87 octain without pinging. Both the Cad and ZR-1 get fewer MPG and loose power with lower octain gases. Go figure why the General could make it work on the ZR-1 thirteen years ago and not have it as a standard in current models. :rant:
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Drifting
Joined: May 2002
Posts: 1,509
Likes: 3
From: Hazel Park MI
Re: what grade gas do you use ??? (Perfusion)
Since I fall in the early L98 category, and gas prices going through the proverbial roof, I'm gonna try mid-grade 89. And I have/was putting in the 94, so we'll see. I may try 87 if no knocking occurs with the 89. :seeya
Melting Slicks
Joined: Aug 1999
Posts: 2,619
Likes: 1
From: Whidbey Island Washington
Re: what grade gas do you use ??? (Perfusion)
We also don't normally see 92-93 octane in WA state either unless it's from a Racing Gas or Aviation gas source. We have 91-89 and 87 at most pumps. My 'old '70 LT-1 really moved (13.89 quarter...stock) with AV gas but that's a whole 'nother generation and story! :rofl:
Melting Slicks
Joined: Jan 2003
Posts: 2,167
Likes: 0
From: What did the 5 fingers say to the face? SLAP!!
Re: what grade gas do you use ??? (j3studio)
Earlier C4s (like my 85) specify mid-grade.
:seeya
:seeya
Team Owner
Joined: Sep 2001
Posts: 62,119
Likes: 1,725
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: what grade gas do you use ??? (flyersfan1088)
Earlier C4s (like my 85) specify mid-grade.
:seeya
Interesting. The owners manual for my '86 only calls for 87 octane, not midgrade (89)
:seeya
Interesting. The owners manual for my '86 only calls for 87 octane, not midgrade (89)
Drifting
Joined: May 2003
Posts: 1,979
Likes: 48
From: Lakeport CA
Re: what grade gas do you use ??? (pwrful c4)
91 is the best we can get around here. My sport bikes require it too... filled the VFR with Chevron yesterday for $2.49. Freakin $8.08 to fill my bike is crazy!! At least it gets great mileage. ;)
Instructor
Joined: Nov 2003
Posts: 112
Likes: 0
From: Newark De
Re: what grade gas do you use ??? (stingray4me)
I use Sunoco ultra 94. Going to fill up today.My daily driver ( ford E-250) Costs me $50 to fill up with regular and I use 2 tanks a week. So filling the vette up every couple of weeks with premium doesn't bother me.BTW, Someone posted that Sunoco was dropping the ultra 94 to 93. My local station still says 94 on the pump,am I getting ripped?
[Modified by Moto64g, 2:25 PM 5/15/2004]
[Modified by Moto64g, 2:25 PM 5/15/2004]
Team Owner
Joined: Aug 1999
Posts: 24,014
Likes: 633
St. Jude Donor '10
Re: what grade gas do you use ??? (Moto64g)
I run a mix of 100 unleaded and 93 unleaded... 1:2
100 = 3.99 gallon ( last time I checked, it usually doesnt move)
93 = 2.10 gallon
it aint cheap.
[Modified by SurfnSun, 2:35 PM 5/15/2004]
100 = 3.99 gallon ( last time I checked, it usually doesnt move)
93 = 2.10 gallon
it aint cheap.
[Modified by SurfnSun, 2:35 PM 5/15/2004]