Which gas to use?
Thread Starter
Instructor
Joined: Nov 2002
Posts: 183
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From: Stockholm, Sweden
Re: Which gas to use? (Mike Ward)
You really ARE trying to up that post count aren't you? ;)
Are those little stars THAT addictive??? :D :D :D
Dep
Are those little stars THAT addictive??? :D :D :D
Dep
For me that has dreamed of a stingray for years and now finally got one, I felt like I wanted to keep it in perfect condition and don't ruin the engine through using wrong fuel. I'm sorry if you think my posting is irrelevant, my question is answered and I will not bother you more about this.
Mike, thank you for your informative post, I start to understand the problematic.
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Re: Which gas to use? (Larsson)
Larsson: That comment you quoted from me was aimed at Fevre...NOT you. You had a legitimate concern and now you can drive the heck out of that Vette without ANY concerns about lead or no-lead :)
Mike: I RESENT lumping Harleys in there with lawn mowers and garbage trucks!!! :mad :nono: :boxing
They are only associated with TRACTORS !!! :rofl: :rofl: :rofl: :rofl:
I agree with what you stated. Good informative post!
Dep
Mike: I RESENT lumping Harleys in there with lawn mowers and garbage trucks!!! :mad :nono: :boxing
They are only associated with TRACTORS !!! :rofl: :rofl: :rofl: :rofl:
I agree with what you stated. Good informative post!
Dep
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Which gas to use? (Dep)
Larsson: That comment you quoted from me was aimed at Fevre...NOT you. You had a legitimate concern and now you can drive the heck out of that Vette without ANY concerns about lead or no-lead :)
Mike: I RESENT lumping Harleys in there with lawn mowers and garbage trucks!!! :mad :nono: :boxing
They are only associated with TRACTORS !!! :rofl: :rofl: :rofl: :rofl:
I agree with what you stated. Good informative post!
Dep
Mike: I RESENT lumping Harleys in there with lawn mowers and garbage trucks!!! :mad :nono: :boxing
They are only associated with TRACTORS !!! :rofl: :rofl: :rofl: :rofl:
I agree with what you stated. Good informative post!
Dep
You are correct though, a 72 does not need a lead substitute.
BTW I could care less about post count, if I did I would be in OT. :rolleyes:
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Re: Which gas to use? (Fevre)
"Have heard conflicting info on whether an lead additive is really necessary but seeing how you are running only 1000 miles or so a year it couldn't hurt and wouldn't cost much"
"it had more to do with whether that was enough miles driven to justify rebuilding with hardened valve seats"
Well I can't read your mind so I don't KNOW what you MEANT, but the first quote SAYS NOTHING about valve seats and DOES SAY that "you are running only 1000 miles or so a year it couldn't hurt and wouldn't cost much".
Mileage is MEANINGLESS with this problem. The damage is done based on hours run and not miles driven.
The post count was a comment I saw on one of the numerous posts you had input in and stuck in my head. Lighten up dood!! :D Or maybe that post count thing hit a nerve?? :)
Oh yeah...here's one of these things you offered me...think you need it a lot more than I do!!!
:chill:
Dep
[Modified by Dep, 3:21 PM 10/25/2003]
"it had more to do with whether that was enough miles driven to justify rebuilding with hardened valve seats"
Well I can't read your mind so I don't KNOW what you MEANT, but the first quote SAYS NOTHING about valve seats and DOES SAY that "you are running only 1000 miles or so a year it couldn't hurt and wouldn't cost much".
Mileage is MEANINGLESS with this problem. The damage is done based on hours run and not miles driven.
The post count was a comment I saw on one of the numerous posts you had input in and stuck in my head. Lighten up dood!! :D Or maybe that post count thing hit a nerve?? :)
Oh yeah...here's one of these things you offered me...think you need it a lot more than I do!!!
:chill:
Dep
[Modified by Dep, 3:21 PM 10/25/2003]
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Which gas to use? (Dep)
Oh yeah...here's one of these things you offered me...think you need it a lot more than I do!!!
:chill:
Dep
[Modified by Dep, 3:21 PM 10/25/2003]
:chill:
Dep
[Modified by Dep, 3:21 PM 10/25/2003]
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Re: Which gas to use? (Fevre)
Fevre:"BTW I could care less about post count, if I did I would be in OT."
Posted by Spook in thread "I have taken my butt kicken for the day"...
"If anyone knows a wuss when they see one its Fevre. I think hes going for a post record. Do you respond to all of them? hehe..."
Take the dang pill and go into :lurk: mode. EVERY post doesn't need input :)
Dep
Posted by Spook in thread "I have taken my butt kicken for the day"...
"If anyone knows a wuss when they see one its Fevre. I think hes going for a post record. Do you respond to all of them? hehe..."
Take the dang pill and go into :lurk: mode. EVERY post doesn't need input :)
Dep
Melting Slicks
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
Re: Which gas to use? (Larsson)
In reading all of the post, I couldn't help but jump in. I'll not comment on the leaded/unleaded debate, but having some 27 years in the oil/gas business and some lab experience, I can tell you that, unless you've increased your engine's compression above about 9:1, then good ole 87 is plenty. The mid-grades and premiums will not contribute to any meaningful HP increases. Sometimes older engines, due to carbon buildups, will benefit from a higher octane gas not causing pinging but this is because the carbon buildup has increased it's compression ratio. Unless you're using a higher-than-87 because of pinging or increased compression ratios, save you extra dough for barley pop. :cheers:
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Re: Which gas to use? (marshrat99)
marshrat99: I'm not so sure about that statement. I have seen engines from Toyota where the owner's manual said using premium fuel actually INCREASED the performance of the engine. If it was 27 years ago I'd probably agree with you 100%. But this isn't 27 years ago and we have a LOT of variables and electronic gizmos in cars that aid them in running better and running at the maximum efficiency possible. Some engines may not benefit from premium gas...others may. I don't think you can make a blanket statement that ALL of them won't benefit from the higher octane.
Dep
Dep
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Burning Brakes
Joined: Aug 2000
Posts: 1,143
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From: Charlotte NC
Re: Which gas to use? (jerryp58)
I agree with the "start with the lowest" octane logic. I've run 87 octane in my '77 L48 since I've had it with no problems.
"The car was built at the factory to run on unleaded fuel" -- Just curious what your source is for this. Not doubting you, but the only information I could find that stated anything specific about unleaded fuel was for the '71 LS6 (no other engines that year) and everything since '73.
"The car was built at the factory to run on unleaded fuel" -- Just curious what your source is for this. Not doubting you, but the only information I could find that stated anything specific about unleaded fuel was for the '71 LS6 (no other engines that year) and everything since '73.
Pro
Joined: Sep 2002
Posts: 599
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From: High Point, NC
Re: Which gas to use? (Larsson)
I thought about this issue alot. When I was a kid in the sixtys I had two uncles that had Corvette's. They both used nothing but AMOCO hightest. It was the only fuel at that time that was lead free. Out of all of the cars they used it in they never had an engine failure. Therefore I use Amoco 93 in my Corvette
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Which gas to use? (Dep)
Fevre:"BTW I could care less about post count, if I did I would be in OT."
Posted by Spook in thread "I have taken my butt kicken for the day"...
"If anyone knows a wuss when they see one its Fevre. I think hes going for a post record. Do you respond to all of them? hehe..."
Take the dang pill and go into :lurk: mode. EVERY post doesn't need input :)
Dep
Posted by Spook in thread "I have taken my butt kicken for the day"...
"If anyone knows a wuss when they see one its Fevre. I think hes going for a post record. Do you respond to all of them? hehe..."
Take the dang pill and go into :lurk: mode. EVERY post doesn't need input :)
Dep
But your input is vital I take it? :rolleyes: I have an average of 6.5 posts a day so I guess they are only 7 threads started each day. :rolleyes:
[Modified by Fevre, 10:58 AM 10/28/2003]
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Re: Which gas to use? (Fevre)
"It's not what you DO say that counts, it's what you DON'T SAY"
A famous game show from the old days. :)
Hey...I got a $10 bet that you post at that newbie's greeting post. Get your postaholic butt over there so I can win a pizza for dinner tonight! :lol:
Dep
[Modified by Dep, 3:23 PM 10/28/2003]
A famous game show from the old days. :)
Hey...I got a $10 bet that you post at that newbie's greeting post. Get your postaholic butt over there so I can win a pizza for dinner tonight! :lol:
Dep
[Modified by Dep, 3:23 PM 10/28/2003]
Le Mans Master
Joined: Aug 2003
Posts: 7,720
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From: Chattanooga TN
Re: Which gas to use? (Dep)
I think that the 9:1 compression w/ 87 octane was meant for carbureted engines. If you have a knock sensor the computer can advance the timing and get some benefit from 89 or 93 octane. My wiifes LT1 Caprice ran fine on 87 octane-you couldn't make it ping, but even better on the good stuff.
Thread Starter
Instructor
Joined: Nov 2002
Posts: 183
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From: Stockholm, Sweden
Re: Which gas to use?
This thread seems to go on forever so I can add some more info:
The engine has higher compression, between 10,5 to 11
We had some friends here that knows atleast something about engines, they said that with a higher compression engine I had to use 98 octane without a doubt, and since it is so old a could use a "booster" (lead addition) if needed.
Everyone here on the forum says so low octanes and everyone in sweden says 98 octane, I wonder if there's a big difference between the fuel in sweden and in America.
The engine has higher compression, between 10,5 to 11
We had some friends here that knows atleast something about engines, they said that with a higher compression engine I had to use 98 octane without a doubt, and since it is so old a could use a "booster" (lead addition) if needed.
Everyone here on the forum says so low octanes and everyone in sweden says 98 octane, I wonder if there's a big difference between the fuel in sweden and in America.
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Re: Which gas to use? (Larsson)
This thread seems to go on forever so I can add some more info:
The engine has higher compression, between 10,5 to 11
We had some friends here that knows atleast something about engines, they said that with a higher compression engine I had to use 98 octane without a doubt, and since it is so old a could use a "booster" (lead addition) if needed.
Everyone here on the forum says so low octanes and everyone in sweden says 98 octane, I wonder if there's a big difference between the fuel in sweden and in America.
The engine has higher compression, between 10,5 to 11
We had some friends here that knows atleast something about engines, they said that with a higher compression engine I had to use 98 octane without a doubt, and since it is so old a could use a "booster" (lead addition) if needed.
Everyone here on the forum says so low octanes and everyone in sweden says 98 octane, I wonder if there's a big difference between the fuel in sweden and in America.
And forget about octane boosters. A complete waste of money. They DON'T raise octane from 98 to 99. The raise it from 98 to 98.1 When they say one point increase THAT'S what they mean. You wouldn't even notice the difference and neither would your engine.
Dep
Le Mans Master
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From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
Re: Which gas to use? (Larsson)
A 72 should not need lead substitute since they started changing fuels in 71 I believe. I would run no lower than 87 in it though.
Le Mans Master
Joined: Oct 2002
Posts: 5,714
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From: Silver City NM
St. Jude Donor '05-'07
Re: Which gas to use? (Sigforty)
A 72 should not need lead substitute since they started changing fuels in 71 I believe. I would run no lower than 87 in it though.
Dep