What gas (octane) do you all use?
Drifting
Joined: Feb 2004
Posts: 1,927
Likes: 9
From: Ozark, Alabama
2004 coupe.
Gasoline Octane.
Owners manual
Page 5-4
Use premium unleaded gasoline with a posted octane of 91 or higher for best performance. You may also use middle grade or regular unleaded gasoline rated at 87 octane or higher, but your vehicles acceleration may be slightly reduced.
I here allot of folks say their OM's say something different. ????
I use 87 and I get ~29.5 MPG
With higher octane the MPG drops to ~26
Anything more that 87 (not the Z or the mod squad folks) is a waste of money ... not necessary.
Car goes like a bat out of hell already so what's the big rip.
However, this is an emotional issue for the owner ... not the car.
Gasoline Octane.
Owners manual
Page 5-4
Use premium unleaded gasoline with a posted octane of 91 or higher for best performance. You may also use middle grade or regular unleaded gasoline rated at 87 octane or higher, but your vehicles acceleration may be slightly reduced.
I here allot of folks say their OM's say something different. ????
I use 87 and I get ~29.5 MPG
With higher octane the MPG drops to ~26
Anything more that 87 (not the Z or the mod squad folks) is a waste of money ... not necessary.
Car goes like a bat out of hell already so what's the big rip.
However, this is an emotional issue for the owner ... not the car.
Burning Brakes
Joined: Jun 2004
Posts: 1,220
Likes: 0
From: St. Robert Missouri
93 (Super) From BP - 91 is readily available, and I know what it says in the OM but..... My feelings would be hurt if my vette forced me to drink Boones Farm rather than Kendall Jackson 
Safety Car
Joined: Jun 2004
Posts: 4,769
Likes: 15
From: Lovin Life Oh
someone ....anyone
correct me if im wrong
higher octanes withstand pressure and heat better than lower octanes thus allowing them to withstand higher compression without detonating before the spark
how then could anyone ever get worse gas milage by using higher octane?
the only thing higher octane will do is ensure the gasoline combusts at exactly the right time
that being said
i only use sunco 94
i had the gas gauge problem when i first bought it cause the sales man stopped at kmart to put gas in
after i bought it i ran a bottle off techron and switched to sunoco 94
i look at it this way....i could either buy 94 instead of 92 or have a 20 min phone call using 10-10-220
ill stick with the 94
correct me if im wrong
higher octanes withstand pressure and heat better than lower octanes thus allowing them to withstand higher compression without detonating before the spark
how then could anyone ever get worse gas milage by using higher octane?
the only thing higher octane will do is ensure the gasoline combusts at exactly the right time
that being said
i only use sunco 94
i had the gas gauge problem when i first bought it cause the sales man stopped at kmart to put gas in
after i bought it i ran a bottle off techron and switched to sunoco 94
i look at it this way....i could either buy 94 instead of 92 or have a 20 min phone call using 10-10-220
ill stick with the 94
Safety Car
Joined: Jun 2004
Posts: 4,769
Likes: 15
From: Lovin Life Oh
Originally Posted by srchief100
93 (Super) From BP - 91 is readily available, and I know what it says in the OM but..... My feelings would be hurt if my vette forced me to drink Boones Farm rather than Kendall Jackson
everytime i drink that i throwup
arg
Drifting
Joined: Feb 2004
Posts: 1,927
Likes: 9
From: Ozark, Alabama
Originally Posted by 98vert6spd
someone ....anyone
correct me if im wrong
higher octanes withstand pressure and heat better than lower octanes thus allowing them to withstand higher compression without detonating before the spark
how then could anyone ever get worse gas milage by using higher octane?
the only thing higher octane will do is ensure the gasoline combusts at exactly the right time
correct me if im wrong
higher octanes withstand pressure and heat better than lower octanes thus allowing them to withstand higher compression without detonating before the spark
how then could anyone ever get worse gas milage by using higher octane?
the only thing higher octane will do is ensure the gasoline combusts at exactly the right time
I started a thread awhile back on this subject and some very knowledgeable folks pinged in on it. Can't find it since the forum switch. My airplane likes 87 too ... much better than 100LL.
Give it a try before your next fill. Just put 5 gallons of the "cheap" stuff in it and monitor the MPG on the DIC. Mash the pedal to the floor and if it doesn't snap your head back, even with the "cheap" stuff then your machine needs a doctor cause it is sick.
Then count your good fortune and buy BEER!
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Joined: Jan 2002
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From: Charlotte NC
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Originally Posted by Tom/99
93 octane
Burning Brakes
Joined: Jun 2004
Posts: 1,164
Likes: 0
From: Edmond Ok
Originally Posted by jcgrcya
Nothing less than 91. Haven't really looked for a local station that carries anything higher, or whether it's even available in California. Anyway, I waited a long time to buy my Vette, so I'm not about to get cheap on the gas.
Safety Car
Joined: Sep 2000
Posts: 3,570
Likes: 420
From: Taildragers rule! USA1
Originally Posted by rbl
2004 coupe.
Gasoline Octane.
Owners manual
Page 5-4
Use premium unleaded gasoline with a posted octane of 91 or higher for best performance. You may also use middle grade or regular unleaded gasoline rated at 87 octane or higher, but your vehicles acceleration may be slightly reduced.
I here allot of folks say their OM's say something different. ????
I use 87 and I get ~29.5 MPG
With higher octane the MPG drops to ~26
Anything more that 87 (not the Z or the mod squad folks) is a waste of money ... not necessary.
Car goes like a bat out of hell already so what's the big rip.
However, this is an emotional issue for the owner ... not the car.
Gasoline Octane.
Owners manual
Page 5-4
Use premium unleaded gasoline with a posted octane of 91 or higher for best performance. You may also use middle grade or regular unleaded gasoline rated at 87 octane or higher, but your vehicles acceleration may be slightly reduced.
I here allot of folks say their OM's say something different. ????
I use 87 and I get ~29.5 MPG
With higher octane the MPG drops to ~26
Anything more that 87 (not the Z or the mod squad folks) is a waste of money ... not necessary.
Car goes like a bat out of hell already so what's the big rip.
However, this is an emotional issue for the owner ... not the car.
Racer
Joined: Aug 1999
Posts: 271
Likes: 1
Originally Posted by rbl
Not true at all. The electronics detune the engine a bit to compensate so the 87 goes bang at "just the right time too"
I started a thread awhile back on this subject and some very knowledgeable folks pinged in on it. Can't find it since the forum switch. My airplane likes 87 too ... much better than 100LL.
Give it a try before your next fill. Just put 5 gallons of the "cheap" stuff in it and monitor the MPG on the DIC. Mash the pedal to the floor and if it doesn't snap your head back, even with the "cheap" stuff then your machine needs a doctor cause it is sick.
Then count your good fortune and buy BEER!
I started a thread awhile back on this subject and some very knowledgeable folks pinged in on it. Can't find it since the forum switch. My airplane likes 87 too ... much better than 100LL.
Give it a try before your next fill. Just put 5 gallons of the "cheap" stuff in it and monitor the MPG on the DIC. Mash the pedal to the floor and if it doesn't snap your head back, even with the "cheap" stuff then your machine needs a doctor cause it is sick.
Then count your good fortune and buy BEER!
I run Regular 87 octane in the winter, Mid-grade 89 octane in the summer. It works fine and it DOES give better MPG. AND I buy the cheap stuff too. But too, I drive the car EVERY day, 82K+ so far. My momma didn't raise me to throw money down the filler neck. You skeptics ought to give it a try, keep records, do it scientifically, I do. I did find out that you do NOT want to run 87 octane in the summer when it is 100deg outside, that will NOT work.
Gary
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I used to put only premium (either 91 or 92 octane) in the car, but I have been recently putting 89 in it. Car runs fine, no pinging and I still get very good gas mileage.
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From: Austin TX
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Originally Posted by 98vert6spd
someone ....anyone
correct me if im wrong
higher octanes withstand pressure and heat better than lower octanes thus allowing them to withstand higher compression without detonating before the spark
how then could anyone ever get worse gas milage by using higher octane?
correct me if im wrong
higher octanes withstand pressure and heat better than lower octanes thus allowing them to withstand higher compression without detonating before the spark
how then could anyone ever get worse gas milage by using higher octane?
When I drove to Las Vegas a month ago, I couldn't find anything better than 91 octane between Oklahoma City and Vegas. The elevation was increasing, and it was a climate with less humidity. I was getting 32 mpg on 91 octane gas as noted on the average mpg dic page. Something was different. I wish I knew the whole story.
Racer
Joined: May 2004
Posts: 264
Likes: 0
From: Miami Florida
Originally Posted by srchief100
93 (Super) From BP - 91 is readily available, and I know what it says in the OM but..... My feelings would be hurt if my vette forced me to drink Boones Farm rather than Kendall Jackson
