E10 Gas 90% Gas/ 10% Ethanol
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,625
Likes: 4
From: Miami FL
E10 Gas 90% Gas/ 10% Ethanol
Florida is making the switch to E10. I just filled up the vette this mornng and as I was nearing full I noticed a new sticker on the pump saying E10. I searched here and on other muscle car forums but could not find a definitive answer if E10 would harm the vette since it is a 69 L46 combo with 9:1 compression and Qjet.
The only items I found were
1. E10 loosens sludge in gas lines & tanks if they are original/old? Mine are all new and the carb has been recently cleaned & rebuilt so I guess I am safe on this issue?
2. Should I reconsider jetting the carb?
3. E10 should have a higher octane reading than regular gas 93 rating according to 1 website. So does this mean E10 @ 87 octane reading on the pump is not actually 90 octane?
I read on here that E85 is crap for our cars and on other forums. I guess all the more reason to continue saving for a fuel injected LS type motor.
btw...my car was literally down to the last gallon and then I drove about 20 miles with the new E10 blend and thus far no problems with the E10 blend that I noticed. We will see when I go home tonight what happens.
The only items I found were
1. E10 loosens sludge in gas lines & tanks if they are original/old? Mine are all new and the carb has been recently cleaned & rebuilt so I guess I am safe on this issue?
2. Should I reconsider jetting the carb?
3. E10 should have a higher octane reading than regular gas 93 rating according to 1 website. So does this mean E10 @ 87 octane reading on the pump is not actually 90 octane?
I read on here that E85 is crap for our cars and on other forums. I guess all the more reason to continue saving for a fuel injected LS type motor.
btw...my car was literally down to the last gallon and then I drove about 20 miles with the new E10 blend and thus far no problems with the E10 blend that I noticed. We will see when I go home tonight what happens.
Last edited by Hadez; Apr 30, 2008 at 03:54 PM.
Safety Car
Joined: Feb 2006
Posts: 4,789
Likes: 7
I don't know about the long term affects on the fuel system, but I can say that I notice a drop in my mpg using Hess gas which contains 10% ethanol. The mileage on my DD went down an average of 10-12% in a tank full. I now pay a few cents more and use Shell, Chevron or Mobil. Of course it probably won't be long until they follow with the E10.
Pro
Joined: Jun 2007
Posts: 634
Likes: 0
From: Hastings MN
Florida is making the switch to E10. I just filled up the vette this mornng and as I was nearing full I noticed a new sticker on the pump saying E10. I searched here and on other muscle car forums but could not find a definitive answer if E10 would harm the vette since it is a 69 L46 combo with 9:1 compression and Qjet.
The only items I found were
1. E10 loosens sludge in gas lines & tanks if they are original/old? Mine are all new and the carb has been recently cleaned & rebuilt so I guess I am safe on this issue?
2. Should I reconsider jetting the carb?
3. E10 should have a higher octane reading than regular gas 93 rating according to 1 website. So does this mean E10 @ 87 octane reading on the pump is not actually 90 octane?
I read on here that E85 is crap for our cars and on other forums. I guess all the more reason to continue saving for a fuel injected LS type motor.
btw...my car was literally down to the last gallon and then I drove about 20 miles with the new E10 blend and thus far no problems with the E10 blend that I noticed. We will see when I go home tonight what happens.
The only items I found were
1. E10 loosens sludge in gas lines & tanks if they are original/old? Mine are all new and the carb has been recently cleaned & rebuilt so I guess I am safe on this issue?
2. Should I reconsider jetting the carb?
3. E10 should have a higher octane reading than regular gas 93 rating according to 1 website. So does this mean E10 @ 87 octane reading on the pump is not actually 90 octane?
I read on here that E85 is crap for our cars and on other forums. I guess all the more reason to continue saving for a fuel injected LS type motor.
btw...my car was literally down to the last gallon and then I drove about 20 miles with the new E10 blend and thus far no problems with the E10 blend that I noticed. We will see when I go home tonight what happens.
The blend will not have a higher octane than is listed on the pump. Pure ethanol has a much higher octane than pure gasoline, and so if you mixed ethanol with 93 octane gas (gasoline only, not a blend) the octane would go up a bit. However, the octane rating on the pump is for the blended fuel.
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
I am avoiding the E10 gas whenever I can. It costs the same money as 100% gas here in my town. I wind up with about 10% less mileage out of a tank of gas. Which in my daily driver is about 40 miles per tank. So, now tell me where the savings is? I have to go back to the pump more often to buy more E10. That is the reason I will be hesitantly buying E10.
Safety Car
Joined: Oct 2004
Posts: 3,725
Likes: 5
From: Minnesota
We've had 10% ethanol in our gas here in MN for years and now they want to shove 20% down our throats. There is no other good reason to use it other than to help the corn farmers. Fortunately we can get normal gas for vintage vehicles, lawn mowers etc. Get an extra fuel filter and take it with you just in case.
Pro
Joined: Aug 2004
Posts: 562
Likes: 1
We've had 10% ethanol in our gas here in MN for years and now they want to shove 20% down our throats. There is no other good reason to use it other than to help the corn farmers. Fortunately we can get normal gas for vintage vehicles, lawn mowers etc. Get an extra fuel filter and take it with you just in case.
True, milage will take a small tug down. True, octane rating will go up; check out the most recent issue of Corvette Magazine and read about the 2008 Vettes running E85.
True, if you're running a carbureter you will be prone to vapor lock in the summer; switch back to gas at brand name stations. I'm running a stroked 454 with a Demon carb and have run in ten degree temps up through 110 degrees for three years with not problems except for marginal vapor lock in the city above 85 degrees. (Years ago we used to run stockers with clothes pins on the fuel line to keep the fuel cool--I'm too embarrassed to try it on my Vette).
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Safety Car
Joined: Oct 1999
Posts: 4,101
Likes: 10
From: NorCal
California has had even higher blends for years, and as stated the mileage is a bit lower, but detonation is less. My main concern is the effect it has on rubber parts of the fuel system, and leaks. The hoses on my BOSS and the Vette turn to rock and needed to be replaced anually befor I switched over to the much pricier barrier (hard plastic lined) FI fuel hose. Also, the fuel pump diaphrams go sooner and the accelerator pump diaphrams have died if I parked them for extended periods, like 6 months. Also, after a period of running time, some of the carb fittings will start to weep fuel and I have to tighten everything up to fix it. REALLY irritating!
So, if you still have a choice, stick to the real stuff! Besides, it's a bad idea to use your food to fuel your transportation.
Hans
So, if you still have a choice, stick to the real stuff! Besides, it's a bad idea to use your food to fuel your transportation.
Hans
Melting Slicks
Joined: Mar 2006
Posts: 2,465
Likes: 0
From: Orange Park Fl
California has had even higher blends for years, and as stated the mileage is a bit lower, but detonation is less. My main concern is the effect it has on rubber parts of the fuel system, and leaks. The hoses on my BOSS and the Vette turn to rock and needed to be replaced anually befor I switched over to the much pricier barrier (hard plastic lined) FI fuel hose. Also, the fuel pump diaphrams go sooner and the accelerator pump diaphrams have died if I parked them for extended periods, like 6 months. Also, after a period of running time, some of the carb fittings will start to weep fuel and I have to tighten everything up to fix it. REALLY irritating!
So, if you still have a choice, stick to the real stuff! Besides, it's a bad idea to use your food to fuel your transportation.
Hans
So, if you still have a choice, stick to the real stuff! Besides, it's a bad idea to use your food to fuel your transportation.
Hans
Melting Slicks
Joined: Feb 2006
Posts: 3,428
Likes: 5
From: Japan
Ditto to all the above. California Air Resources Board ("CARB") published a paper in the mid-90's (CA was switched to E10 in 1994) indicating that vehicle fires had nearly tripled in California since its implementation as a motor fuel. The smog police insist that it reduces emissions, which in a left-handed way might be true, but I myself repeatedly observed a 1:1 reduction in mileage with it vs. straight gasoline, i.e., 10% ethanol=10% less mpg, so you actually burn MORE fuel to go the same distance. "Hi, we're from the government, and we're here to help you!"
Burning Brakes
Joined: Oct 2006
Posts: 1,006
Likes: 28
From: Lutz Florida
I saw my local Hess station had 10% Ethanol stickers on all the pumps now. Gas price wasn't any cheaper than the station across the street. Until or unless they change over all gas here to part Ethanol I'm going to avoid it. Why take a chance? Or pay the same price for a product that gives lower mileage? The more I read about Ethanol, the less I'm impressed with it.
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Ditto to all the above. California Air Resources Board ("CARB") published a paper in the mid-90's (CA was switched to E10 in 1994) indicating that vehicle fires had nearly tripled in California since its implementation as a motor fuel. The smog police insist that it reduces emissions, which in a left-handed way might be true, but I myself repeatedly observed a 1:1 reduction in mileage with it vs. straight gasoline, i.e., 10% ethanol=10% less mpg, so you actually burn MORE fuel to go the same distance. "Hi, we're from the government, and we're here to help you!"
Pro
Joined: Jan 2004
Posts: 535
Likes: 1
From: Darwin, Australia NT
Here in Australia the 10% ethanol is about 10% cheaper than regular fuel of the same octane. Ive been using it on my smallblock with no problems and plan to use it on my new 540.
Technically one would have to richen up by about 5%.
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
After reading the e85 thread in C1/C2, I'm seriously considering building my new EFI 400 as an e85-only engine running 11:1-12:1 compression. Even at the slightly lower fuel economy, the idea of running 103 octane gas sounds like fun. 
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
With more ethanol in the fuel, the octane level goes up, so you could up your CR, adjust your timing accordingly. The mpg will suffer less that way.
For the rest you could slightly adjust the jetting.
For the rest you could slightly adjust the jetting.
