I've only done a little reasearch on this and am pretty sure we're not spose to run E85.
I was just curious, can you run E85 on a '03 G35 or '03 Max? Any disadvantages if you can?
Just notice it poping up at gas stations around Austin and got curious.
85% Ethanol 101 Octane fuel (E85) on '03 G35 or Max?
Re: 85% Ethanol 101 Octane fuel (E85) on '03 G35 or Max? (mikeatx)
Special flexible fuel lines, gaskets, seals have been designed into cars that are designated "E85". There are probably other changes too.The higher octane rating is necessary to compensate for other properties of the fuel so the vehicle will run efficiently.
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Q45tech
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1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
Re: 85% Ethanol 101 Octane fuel (ezflow)
To generate the same HorsePower E85 must flow at 25% higher rate therefore you wll get 25% LOWER MPG vs conventional gasoline [without oxygenates].
Even ethanolized [10%] gasoline will consume 3-4% more fuel per mile than non oxygenated.
The secret is that ethanol has a high RON value and a lower MON value than the MTBE it replaced in oxygenated gasoline so the same OCTANE PUMP LABEL NUMBER may be functionally INFERIOR to the old MTBE blend.
High compression engines may react badly to ethanolized gasoline depending on the exact MON value the engine needs?
Keeping the plugs, valve stems, and piston crowns clean of deposits is critical [even more critical the higher the ethanol percentages].
Even ethanolized [10%] gasoline will consume 3-4% more fuel per mile than non oxygenated.
The secret is that ethanol has a high RON value and a lower MON value than the MTBE it replaced in oxygenated gasoline so the same OCTANE PUMP LABEL NUMBER may be functionally INFERIOR to the old MTBE blend.
High compression engines may react badly to ethanolized gasoline depending on the exact MON value the engine needs?
Keeping the plugs, valve stems, and piston crowns clean of deposits is critical [even more critical the higher the ethanol percentages].
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Q45tech
- Moderator
- Posts: 14365
- Joined: Tue Apr 30, 2002 3:19 am
- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
Re: 85% Ethanol 101 Octane fuel (Q45tech)
Ethanol RON =129Ethanols blending average ~~= 118 it degrades when nblending into gasoline
"The power output of an engine depends on the energy content of its fuel, and this bears no simple relationship to the octane rating. A common myth amongst petrol consumers is that adding a higher octane fuel to a vehicle's engine will increase its performance and/or lessen its fuel consumption; this is mostly false—engines perform best when using fuel with the octane rating they were designed for and any increase in performance by using a fuel with a different octane rating is minimal."
The trick is you can use some REALLY REALLY REALLY bad gasoline and blend it with ethanol and get very very good numbers but have bad performance.
Octane in an ethanolized blend has become almost meaningless now
"The power output of an engine depends on the energy content of its fuel, and this bears no simple relationship to the octane rating. A common myth amongst petrol consumers is that adding a higher octane fuel to a vehicle's engine will increase its performance and/or lessen its fuel consumption; this is mostly false—engines perform best when using fuel with the octane rating they were designed for and any increase in performance by using a fuel with a different octane rating is minimal."
The trick is you can use some REALLY REALLY REALLY bad gasoline and blend it with ethanol and get very very good numbers but have bad performance.
Octane in an ethanolized blend has become almost meaningless now
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