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Mileage effect of E10
Posted by mag (more from mag) on Thu, 16 Jul 2009 19:32:41
There's been chatter for ages that adding small portions of ethanol to gas reduces mileage noticably. General complaints vary from 0 - 15% for 10% ethanol.

Is there a true fuel phenomenon here? Does anyone have a pointer to a solid study?

Also, can anyone suggest why adding 10% ethanol might change mileage far out of proportion with the change in BTU content?

(I noticed in the '90s that may 1986 90T got about 10% worse mileage (while driving in CA) on California gas than on Nevada gas. But that was with MTBE, not ethanol, or so I thought.)


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