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Old 04-19-2010, 12:54 AM   #78 (permalink)
Nerys
Grrr :-)
 
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Join Date: May 2008
Location: Levittown PA
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Cherokee - '88 Jeep Cherokee
90 day: 19.44 mpg (US)

Ryo-Ohki - '94 Geo Metro Xfi
90 day: 50.15 mpg (US)

Vger 2 - '00 Plymouth Grand Voyager SE

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attacks were unintended. I can seem to come off harsh. Mention when I do and ignore them please they are not intended.

Your car seems to be epa'd at 21mpg. What is the ORIGINAL epa highway for your car? (ie not the new adjusted epa highway figure but the original in 1997 highway figure) ie what was on your windshield when it was new in 1997

so you get 16mpg on E85? and 21mpg on E10? or E0?

I came up with the 16mpg by subtracting 40% from my van's normal 28mpg. (Someone here said its 35-40% less efficient to use E85) with newer cars seeing a 30% drop in FE on E85.

I am confused as to how your only seeing a 23.75% drop in FE even the straight math says that should not be possible?? unless the 21mpg is "new" epa measure then that explains it IE your 1997 EPA figures might be higher than 21mpg? (thats why I need to know that)

I am also confused as to what figures you are plugging in.

Using my gas price of $2.70 and your adjustment of 35 cents cheaper I come up with these numbers

at 21mpg and $2.70 you pay 12.8 cents per mile

at 16mpg 14.6 cents per mile at $2.35 a gallon ie nearly 2 full cents more per mile

even at 17mpg you would still be paying 13.8 cents per mile or a full penny more per mile on E85 at 35 cents cheaper and you yourself said its 25-35 cents cheaper.

so thats "best case" scenario. What am I missing?

assuming you get 17mpg and save a full 35 cents per gallon and assuming you gas is as cheap as NJ gas you would pay $120 MORE per year at 12,000 miles a year on E85 over E10/E0 (whatever your getting 21mpg on)

What did I miss?