E85 Options

[badbu68]

I know some of you were interested in this considering the detonation resistance of 105 octane. You should be awaire though that the like gasoline, different winter blends cause different properties, apparently w/ e85 it's a 70% ethanol 30% gasoline blend. Anyway, check this out for tuning properties, I know it's a subie site but just try and overlook that;

http://www.cobbtuning.com/tech/instruction...ubarusv1.08.xls

[scorp28]

Yes you are getting less MPG but with the price being so much lower you spend less dollar's per mile which is where the savings come in to play.

I dunno where you buy gas, but E85 around here, if you can find it, costs maybe 40 cents less per gallon than 87 octane

Based on research and studies that I have read you can expect to see a drop in fuel economy of ~10% when using E-85 in a turbocharged car.

As an example lets say you have a 10 gallon fuel tank and you get 30MPG on regular unleaded. Lets also say that gas is $3.00 per gallon. In this scenario you would be able to go 300 miles on $30.00.

Now with E-85 in that same vehicle you would only get 27MPG (at a 10% loss in economy) so you would only be able to go 270 miles, but if you paid $.40 less per gallon for the E-85 you would have only spent $26.00.

Since you would have $4.00 left out of the $30.00 that you started with you could buy 1.538 more gallons of E-85 and at 27MPG drive another 41.5 miles bringing you total mileage up to 311.5 miles for the same 30 dollars.

Again this is based on studies that I have read as I have not tried it out myself.