Regular gas?
Melting Slicks
Joined: Sep 2005
Posts: 2,670
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From: merritt island fl
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Le Mans Master
Joined: Feb 2002
Posts: 5,394
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From: cumming ga
Le Mans Master
Joined: Feb 2002
Posts: 5,394
Likes: 281
From: cumming ga
Drifting
Joined: Aug 2007
Posts: 1,644
Likes: 12
From: Sin City NV
I thought I read this on the online PDF it is actually on the chevrolet website.
http://www.chevrolet.com/corvette/specifications/
Under Specifications select Engine.
2008 Corvette
Recommended unleaded fuel
Coupe = 93 octane
Convertible = 93 octane
Z06 = 93 octane (required)
http://www.chevrolet.com/corvette/specifications/
Under Specifications select Engine.
2008 Corvette
Recommended unleaded fuel
Coupe = 93 octane
Convertible = 93 octane
Z06 = 93 octane (required)
Le Mans Master
Joined: Oct 2005
Posts: 6,410
Likes: 2
From: GTA, ON , Retired,,
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
no mods,except for intake,reg gas yields 29/30 mpg,consistantly.No knocks no pings,on the same 3500 mile trip,after 3 tanks of premium,no difference in fuel consumption.In fact there was zero sotp difference,in a quarter mile perhaps trap times may be off a bit with reg and perhaps not.Now I know not all engines are created equal,nor are all electronics,but my setup works with reg fuel,lucky I guess.
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Brett Foote
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
...especially when 91 octane rated fuel is recommended.Using Mexican Pemex is always a crap-shoot. Just like with drinking the water....with Pemex you never quite know for sure what you'll end up with.
Melting Slicks
Joined: Nov 2007
Posts: 3,365
Likes: 1
From: Oklahoma City
this one is pretty simple math. If regular costs $3 a gallon and premium $3.20, and you assume 30 mpg, then losing two mpg with cheaper fuel costs basically the same. If you get less than 30 mpg, it actually costs more. So why mistreat the engine ? With winter coming on, I think you'd want the best gas you could put in the car, just to make sure it doesn't freeze up or vapor lock.
Melting Slicks
Joined: Jan 2005
Posts: 2,326
Likes: 5
From: louisville "derby city" kentucky
the top four auto makers recommend TOP TIER GAS. to find out why, check out toptiergas.com there are only eight refiners nationwide that are making it at this time. this has been discussed before here on the forum. all i use in mine. no problems at all.........cranky 
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
you can use anything you want, and ignore the manual, if you choose. not wise, but you CAN do it.
what isn't written in the manual is that there is such a thing as "light pinging." that is, pinging that you have a great deal of difficulty hearing over the engine noise, road noise, other traffic and anything you may have playing in your car. altho not immediately damaging, it has a cumulative effect.
as the saying on CF and elsewhere goes, YMMV, your my mileage may vary...
I'd go premium per the manual ... and I do!
what isn't written in the manual is that there is such a thing as "light pinging." that is, pinging that you have a great deal of difficulty hearing over the engine noise, road noise, other traffic and anything you may have playing in your car. altho not immediately damaging, it has a cumulative effect.
as the saying on CF and elsewhere goes, YMMV, your my mileage may vary...
I'd go premium per the manual ... and I do!
Drifting
Joined: Jul 2007
Posts: 1,587
Likes: 90
Its not about being 'cheap' its about spending more that you need. I think the manual states if you are in 'competitive' driving situations, premium is needed, else regular is just fine.
To me, that means my daily, routine trips I use regular. If I plan to be a bit more agressive, then I use the 91 stuff.
To me, that means my daily, routine trips I use regular. If I plan to be a bit more agressive, then I use the 91 stuff.
Instructor
Joined: Aug 2007
Posts: 224
Likes: 0
From: Hoschton Georgia
Why not split the difference and use mid grade? That's what all my friends who have vettes use and with no problems. Even the dealers around here all say that you can use the mid grade without troubles.
Racer
Joined: Jul 2006
Posts: 462
Likes: 8
From: Las Vegas NV
Supreme, Premium, Ethel, Super, Top Dog, Who's your Daddy, this or that brand name for the latest alledged "high octane" pump gas, market BS aside...91 Octane rating is "recommended" for the 07.
Yet even with 91 octane I still get pinging = detonation. Not sure how that could be since 91's recommended and I use it exclusively, but I guess from my experience, crap gas regular's out of the question since my knock retarded computer can't even handle 91...or whatever BS name gas stations call it these days.
jer
Yet even with 91 octane I still get pinging = detonation. Not sure how that could be since 91's recommended and I use it exclusively, but I guess from my experience, crap gas regular's out of the question since my knock retarded computer can't even handle 91...or whatever BS name gas stations call it these days.
jer
So for me, this is not wondering if I should use mid (89) or low (87) grade gas. Never used either. This is about I'm using top grade 91 and I still get detonation...on a 07 vette with no carbon instead pinging under certain conditions since it had 3 miles on it.
Imagine that.
jer
Drifting
Joined: Nov 2007
Posts: 1,290
Likes: 2
From: Eagle ID
So, can we get some help from the engineer types? I was told that regular (87 octane) burns hotter than premium (91 octane) and can be a problem over time, that is, more likely to "burn" valves and pistons. True? Along with that information, I was advised that if I was to burn regular gas, to avoid it on long trips. I am ashamed that I do not know the composition of the valves or how they are coated/protected. I do know that the valves in my 911 are sodium cooled in order to withstand the higher temperatures found in air (and oil) cooled engines. It might also be helpful for someone to describe what that detonation - or pinging - is technically and why/how it is a bad thing for engines.
I figure the cost of premium is inconsequential when compared to the investment, my desire for optimal performance and just doing the right thing for the engine.
PC/Flame Protection Statement: I also realize this is just my thinking and others may see it differently. Hey, I'm new here.
I figure the cost of premium is inconsequential when compared to the investment, my desire for optimal performance and just doing the right thing for the engine.
PC/Flame Protection Statement: I also realize this is just my thinking and others may see it differently. Hey, I'm new here.
Melting Slicks
Joined: Jan 2005
Posts: 2,326
Likes: 5
From: louisville "derby city" kentucky
check out this website: www.toptiergas/retailers.html this has been discussed and cussed on here before. top tier is all i use and never have had a single issue with my 05 vert.......
Safety Car
Joined: Jul 2001
Posts: 4,456
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From: Spicewood, Texas, USA TX-Texas