photoguy

It only costs about 3.00 more to fill up with 93. I think it is worth it!

davekp78

Yeah!
In 1963 (if I remember correctly) the Motor Trend "Car of The Year" was not the newly introduced C-2 Stingray- it was a RAMBLER!!!!!!!!!!

CHASLS2

I use 93 only!

z51vett

On reg gas mileage suffers I know from exp.
z51vett

z51vett

On reg gas mileage suffers I know from exp.
z51vett

GaussianMist

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)

northslopefirst

Has anyone used 104 to boost octtane?
I have only used it in Mexico on the bikes, it helps there.

NOCRISIS

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.

Wayne O

...especially when 91 octane rated fuel is recommended.

They sell a variety of racing fuels at the tracks I run on. My car is tuned specifically for 91 octane so I've never tried racing fuels. My friend in a modded Evo does use higher octane racing fuel and he claims it increases power.

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.

rjbraud

Leprkon

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.

cranky

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

AORoads

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!

vdavenp802

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.

PAmotorman

i went on a trip with another corvette and he used regular and i used high test and every time we filled up he took more to fill up than i did so it hurts your MPG

CoyoteRed

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.

lvjetboy

Wonder if I'd ping with 93. Light ping or heavy ping believe me, I know a ping...detonation. 93 is not pump gas top of line here. 91 is top pump gas here.

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

Sherman Fretwell

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.

cranky

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.......

JmpnJckFlsh

You got that right...change your car magazine; not your gasoline. Use premium...GM makes plenty of cheaper cars that will "be all they can be" on regular gasoline.