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There is a nice little write up about changing your car to flex fuel, and convert it to the next gen fuel which is e85 ethanol! there are kits for your prius 1000 and less now!

Flex Fuel Kits!
 

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If pumps say the gasoline we pump may contain up to 15% ethanol, meanwhile this gas is 85% ethanol, which is better for your car? which has a better octane level?
 

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Does anyone even trust these kits? are they even worth your time? also the cost of buying on installing one, vs the price of your car over time and the gas spent how long would it take to reeep in the benefits of the Conversion kit
 

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I don't trust ANY "kit" or modification that is not approved by the manufacturer.
I especially don't trust things like this.

And until we start running out of gasoline, there is no good economic reason to do this anyway.......because the ethanol has a LOT less energy density than gas.
Because of that, most owners of flex fuel cars still do not use E85 because the cost per mile driven often ends up being higher.

Octane rating does NOT equate to "better" anything in fuel.
 
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