Ethanol % calculator

[Iam Broke]

For the mathematically challenged....

http://www.intercepteft.com/calc.html

Bottom section is the best IMO. Just wanted to share.

[Breadfan]

Thank you for that. I've just built myself an ethanol tune and this calculator validates the veracity of my calculations. I blended 11:4 E10:E85 for E30. Looks like I was right on the money.

[Iam Broke]

E35 is a lot simpler at 2:1 93 and E85 to mix.

[Breadfan]

Well, setting aside from the fact that there is no 93 here in CA and all the gas contains up to 10% ethanol, E30 is just a step on my journey. I didn't go straight to 2:1 because I am carefully working up to it. Any ratio is easy. Just start with an almost empty tank and add the right number of gallons of E85, then fill the rest with E10.

With E85 in a 15 gal tank:
1gal = 14:1 = E15
2gal = 13:2 = E20
3gal = 12:3 = E25
4gal = 11:4 = E30
5gal = 2:1 = E35
6gal = 3:2 = E40
7gal = 8:7 = E45
7.5gal = 1:1 = E47.5

This spans the range from ~4% fuel trim increase to ~10% for however you adjust. (whether skewing MAF or changing fuel inj const.)

[Freakotec]

That one looks basically identical to the one that I've been using as well..

http://e85prices.com/milesperdollar.htm

[cobaltssoverbooster]

the calculator is a great E fuels tool and the link to the calculator has been added to the general info lnf thread.
thank you