Fuel economy thread

[jcp123]

mini cooper s with no mods (a rarity, but i like my warranty)
with my heavy right foot, a pretty good mix between city and highway, and the addition of up to about 15% ethanol to our gas here in VA, i am getting about 26 mpg.

before the ethanol, i was making just below 28mpg, but the ethanol makes it slower, rougher running, poorer mileage, and makes the tailpipe black like an old diesel's.

Yeah, the ethanol isn't going that well in cars that aren't made for it. I've heard similar complaints all over the place about it.Performance builders familiar with building alcohol drag engines are looking pretty hard at it though since it has characteristics similar to alcohol (high resistance to detonation, but less heat energy than gasoline).

[D'ARTOIS]

Alfa 166 sedan, 2.0 TS 16v, 150 Hp - I manage just a regular 1 : 9,5 kms - on the highway to France just 1 : 11 kms; excactly like Alfa Romeo states in their brochure.

[cmcpokey]

Yeah, the ethanol isn't going that well in cars that aren't made for it. I've heard similar complaints all over the place about it.Performance builders familiar with building alcohol drag engines are looking pretty hard at it though since it has characteristics similar to alcohol (high resistance to detonation, but less heat energy than gasoline).

theoretically it would work great, it boosts the octane quickly, easily, without as much refining of the gas, but the O2 sensors, and fuel injection systems need to be re-callibrated. what ends up happening is it doesn't see the right numbers coming out of the tail pipe, so it dumps more gas in, and then you get poor mileage.