Octane
Registered User
Joined: May 2001
Posts: 1,122
From: Memphis, TN, USA
I've run 93 octane since day one. The only exception was when I stopped to gas up in Arkansas and their highest was 91 (which gave me no problems, but it was all highway driving with the cruise set on 78)
I used to own a 2001 Z28 that I bought as a demo. The manager had been driving it for 3 months and ran 87 octane. I had to have the top end cleaner procedure done 3 times to get rid of carbon deposits which the dealership blamed on the other dealership running 87 octane for 3,000 miles.
Needless to say, I won't run the lower octane unless I have to.
FWIW .... Here in Memphis, Amoco sells 93 octane for $1.78 / gallon. Sam's Club sells 93 octane for $1.52 / gallon. I've been running Sam's gas for 4 tanks now with no ill effects.
I used to own a 2001 Z28 that I bought as a demo. The manager had been driving it for 3 months and ran 87 octane. I had to have the top end cleaner procedure done 3 times to get rid of carbon deposits which the dealership blamed on the other dealership running 87 octane for 3,000 miles.
Needless to say, I won't run the lower octane unless I have to.
FWIW .... Here in Memphis, Amoco sells 93 octane for $1.78 / gallon. Sam's Club sells 93 octane for $1.52 / gallon. I've been running Sam's gas for 4 tanks now with no ill effects.
Disciple
Joined: Mar 2000
Posts: 873
From: Chicagoland, IL www.5thGen.org
I like octane so much it's my frickin screen name! LOL
But seriously, I use nothing but BP/Amoco 93 Octane gas in my Z28. And if there was any Sunoco stations around here, I'd use Sunoco 94 Octane.
But seriously, I use nothing but BP/Amoco 93 Octane gas in my Z28. And if there was any Sunoco stations around here, I'd use Sunoco 94 Octane.
Registered User
Joined: Dec 2001
Posts: 511
From: Soon to be Pensacola
You can alternate octane ratings depending on the weather and the mods on your car.
The lower octane just causes the car to take timing out of the engine which lowers power output.
If you have mods that lean the car out, definately don't skimp on octane.
If you have mods that cool incoming air and the combustion chamber, you can drop the octane safely and with little/no power loss.
Also, the cooler the outside temp, the less octane you can get away with.
If you drive with a light foot, lower octane is fine too. If you are hard on the throttle, you need cooling mods to drop the octane.
This is what I have learned from experimenting with mods, defeating KR/ping, and experimenting with rich/lean conditions.
Good luck
Dave
Btw: High octane is actually bad for your car if it doesn't require it. It is quick to build up carbon in the cylinder, which causes ping, excessive octane also burns slower and reduces fuel economy when not needed. The best thing to do is vary octane depending on how you will be driving through that tank of fuel and how the weather is while you are on that particular tank. Use only what you need.
The lower octane just causes the car to take timing out of the engine which lowers power output.
If you have mods that lean the car out, definately don't skimp on octane.
If you have mods that cool incoming air and the combustion chamber, you can drop the octane safely and with little/no power loss.
Also, the cooler the outside temp, the less octane you can get away with.
If you drive with a light foot, lower octane is fine too. If you are hard on the throttle, you need cooling mods to drop the octane.
This is what I have learned from experimenting with mods, defeating KR/ping, and experimenting with rich/lean conditions.
Good luck
Dave
Btw: High octane is actually bad for your car if it doesn't require it. It is quick to build up carbon in the cylinder, which causes ping, excessive octane also burns slower and reduces fuel economy when not needed. The best thing to do is vary octane depending on how you will be driving through that tank of fuel and how the weather is while you are on that particular tank. Use only what you need.
Registered User
Joined: Jan 2002
Posts: 5,308
From: Oshawa - Home of the 5th-gen
I like "ratio411" and "robvas"'s ideas better. Anybody running 92+ in relatively stock cars is wasting money IMO
. And exactly like "ratio411" said, higher than necessary will cause carbon build up, because the compression isn't high enough in the engine to generate the required heat to completely burn all the fuel, so it leaves deposits, and is actually worse on gas
. To me, that isn't worth ~$5 more per tank
. Especially not twice a week?!
. And exactly like "ratio411" said, higher than necessary will cause carbon build up, because the compression isn't high enough in the engine to generate the required heat to completely burn all the fuel, so it leaves deposits, and is actually worse on gas. To me, that isn't worth ~$5 more per tank. Especially not twice a week?!
Registered User
Joined: Jul 2000
Posts: 63
Yeah 4.29!! its expensive. I put in maybe 3 gallons of 100 to 13.8 gallons of 91. It puts me at like 92.6 octane, if you calculate it out. FIlling up this mix is $6.75 more than all 91. So, for the track, it is worth it. But around town I'm doing ok. When summer comes, its a whole new ball game.
jp
jp
Banned
Joined: Mar 2002
Posts: 4,254
From: Darien, IL, usa (Chicago W.Suburbs)
Originally posted by camaro98_speed
Yeah 4.29!! its expensive. I put in maybe 3 gallons of 100 to 13.8 gallons of 91. It puts me at like 92.6 octane, if you calculate it out. FIlling up this mix is $6.75 more than all 91. So, for the track, it is worth it. But around town I'm doing ok. When summer comes, its a whole new ball game.
jp
Yeah 4.29!! its expensive. I put in maybe 3 gallons of 100 to 13.8 gallons of 91. It puts me at like 92.6 octane, if you calculate it out. FIlling up this mix is $6.75 more than all 91. So, for the track, it is worth it. But around town I'm doing ok. When summer comes, its a whole new ball game.
jp
Thread
Thread Starter
Forum
Replies
Last Post
PFYC
Supporting Vendor Group Purchases and Sales
2
Aug 24, 2015 06:41 AM