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#1 (permalink) | |
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Banned
Join Date: Feb 2006
Posts: 6,656
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BUSTED: why some of you complain about you car's performance on E85
Today in World Opinion: “We are not getting gas that starts out as 87, 89, or 92 [octane]…it is obviously bad for the consumer who doesn’t know any better.”
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#2 (permalink) | |
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4.6 Liter Northstar V8
Join Date: Feb 2005
Posts: 1,588
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Re: BUSTED: why some of you complain about you car's performance on E85
Quote:
Last edited by davidlane : 08-06-2008 at 07:32 PM. Reason: Clarity, more info |
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#3 (permalink) |
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Walking
Join Date: May 2008
Posts: 12
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Re: BUSTED: why some of you complain about you car's performance on E85
I'm more concerned about what we are really getting with E10. Ethanol is great stuff for making for smooth combustion. Even a little bit can cover up crap gas.
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#4 (permalink) |
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2.4 Liter SIDI ECOTEC
Join Date: Nov 2005
Location: The Peoples Republic of California
Drives: 1968 Malibu
1971 Monte Carlo
1974 C10
Posts: 297
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Re: BUSTED: why some of you complain about you car's performance on E85
Consumers are complaining of lower MPG, and the writer is contributing it to the base gas being of 83 RON??? This is another case the uninformed internet experts, lowering the octane will not effect the MPG, beside ethanol will raise the octane of that base stock 83 RON to well over 93 when it is E85. The loss of MPG is due to the lower BTU's of ethanol over gasoline.
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__________________
The difference between genius and stupidity is that genius has limits.
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#6 (permalink) |
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GMI Staff Member
Join Date: Jan 2005
Location: 85541
Drives: 6-GM, 1-Dodge, 1-Jeep, 1-Polaris, 1-Yamaha.
Posts: 2,758
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Re: BUSTED: why some of you complain about you car's performance on E85
While true, 10% ethanol can boost bad gas to 87 octane, in the midwest most of the cheap-gas is either 89 or 90 octane and 10% ethanol.
87/88 octane gas is midgrade, and 91-93 is premium. If all things are right, about a 5% loss in mileage when using Ethanol blend. About 30% mileage loss with E85.
__________________
Who is John Galt? - |
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#7 (permalink) |
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6.2 Liter LS3 V8
Join Date: Apr 2005
Posts: 3,479
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Re: BUSTED: why some of you complain about you car's performance on E85
Lower octane doesn't lower mpg, just as higher octane doesn't increase it. All it would do is cause the engine to knock, and eventually break.
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#8 (permalink) |
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Walking
Join Date: Jan 2008
Location: Sagle, Idaho
Drives: '03 Ram Diesel
Posts: 12
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Re: BUSTED: why some of you complain about you car's performance on E85
The original article qouted someone that is ignorant of anything involving engineering or combustion engineering. Of course you'd start with a lower octane gasoline, as other posters have said the ethanol raises it anyway. Increased octane above the level required to prevent pre-ignition doesn't help, and may hurt fuel efficiency.
The problems with E85 in dual fuel engines is that ethanol has a lower heat content, and the compression ratio of today's engines optimized to run on gas, does not get the most out of the energy in ethanol. I believe compbustion temperatures are also lower, leading to efficiency losses. |
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#9 (permalink) |
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2.8 Liter Turbocharged V6
Join Date: Mar 2005
Location: Fox Valley Wisconsin
Drives: 2008 Impala,1981 Bonneville, 1985 Caprice
Posts: 951
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Re: BUSTED: why some of you complain about you car's performance on E85
I havent tried E85 in the Impala yet. I probably wont in the near future since it doesnt seem economicly advantagious to do so.
__________________
2008 Chevrolet Impala LS. 1981 Pontiac Bonneville. "The last full sized RWD Bonneville". 1985 Chevrolet Caprice. 2007 Sears Craftsman Lawn Tractor. 1986 John Deere Lawn Tractor. |
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#10 (permalink) |
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1.8 Liter ECOTEC
Join Date: Jan 2009
Posts: 49
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Re: BUSTED: why some of you complain about you car's performance on E85
For the most part, my brother's Sebring (2004) runs noticeably stronger on E85. Sure, it produces ~ 30% less energy per content, but then you run ~40% richer mixture thus off-setting the energy loss, and actually showing a mild gain. This is why many dyno-test documenting both fuels shows that e85 consistently makes more power/torque than the exact same engine running on gasoline.
__________________
1968 Dodge Coronet 2001 Honda Insight 2005 Pontiac Vibe 1989 Shelby CSX #500/500 |
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