Only about $0.20 more a gallon for non ethanol where I get mine at. My last truck got almost 5 MPG more on it. My Goldwing motorcycle got 10 MPG more on it.

 

So that would defiantly defeat the extra MPG's you are getting. So when the EPA does mileage ratings to they use pure gas or do the use the 10% ethanol any one know?

 

Pure gas is what they use

http://www3.epa.gov/fueleconomy/documents/420f14015.pdf

See page 3

 

The highest MPG I had on 87 was 18.1mpg but that was after driving like I was driving Miss Daisy for the whole tank.

Regular driving was closer to 15-16mpg. For a while it was at like 14.8 or so.

Now running e85 I'm close to about 12.2-12.5mpg for about a 20-25% decrease in efficiency.

Regular gas is at like $1.89-$1.99

E85 is at $1.39-$1.49

Price difference is 26% so I net better mileage per dollar by going E85 lol

 

Be careful on here using math that makes sense. Someone will inevitably show up with their slipstick (slide rule) and try to prove you wrong. I did the same comparison when I had a 5.0L. I was getting about 18.5 pretty steady after having 2500 or so miles on it. I started using E85 because it was $.60 less per gallon. I was getting about 16.7 on E85 for about 2000 miles.

I did the math, it made economical sense to run E85 as long as it stayed a certain amount below regular.

 

Yep you're right about that. I figure if I don't get more than like 2.5-3mpg worse at a $0.50 cost savings then it makes economic sense.

 

doesn't NASCAR run on ethanol now?

 

I've run about 4 tanks of e-85 and so far no problems. It dropped about 2.7 mpg and is 45 cents less per gallon. What I don't understand is how you can say there is better performance, if running premium doesn't increase performance how can e-85 bump it up?
It is nice to fill up for $32.00.

 

e85 is 105 octane or so.

 

All you guys doing the math, don't lose sight of the forest from the trees.

If you're talking a 25% decrease in fuel mileage with even a 30% decrease in cost, your net savings is 5%.

If you average $100 a week in fuel, you're saving about 1.5 cups of coffee per week.

I filled my 36 tank with 29 gallons of regular gas up here in the expensive New England region at $2.19 a gallon and it cost me ~$65. That'll probably last me 2 weeks anyway.

Closest E85 price reported on e85prices.com is in Pennsylvania at a cost of $1.99. That's a cost savings of about 10% for what would be an efficiency decrease of at least 25%, or a net negative 15%, and I'd have to fill up in a little over a week.