Help.... Please!

I need some serious help with a math problem I'm struggling with. Please ask your friends, and find out what has changed with mathematics principles that I've obviously missed. Careful, controlled experimentation, with significant repetition, has proven well beyond any possible question, that my Camry gets 37 miles per gallon when running on pure gasoline, and 29 miles per gallon when running on a 90/10, gas/ethanol blend. These numbers have proven consistent, tank after tank, repeated over and over, alternated, interspersed, repeated again, across all kinds of driving, tank after tank, for almost 20,000 miles now. These are actual measurements. Okay, so let's move on to the math question. Assuming I drive 25,000 miles in a year... at 37 mpg, this means I'll burn 675 gallons of actual gasoline if I run entirely on pure gas. If I run the blend, at 29 mpg, I'll burn 862 gallons of the blend. So far so good. So given that I'll burn 862 of the blend, and since the blend is 90% real gasoline, and since 90% of 862 is 775, this means that if I run the blend, I'm burning 775 gallons of actual gasoline plus 87 gallons of ethanol. So look: I burn 675 gallons of actual gasoline running the pure gas, whereas I burn 775 gallons of actual gasoline (plus 87 gallons of ethanol) when I run the blend. Notice anything about the amount of real gasoline I burn under those two alternatives? Here's my question: How in the @#$%& is moving from 675 gallons to 775 gallons going to help reduce the country's consumption of fossil fuel? How is 775 LESS than 675? ... especially after factoring in the fuel needed to produce the ethanol in the first place (farmer's tractor fuel, transportation of the corn, transportation of the ethanol, fuel to run the distillery, etc.)? In fact, if you believe the economists who say that it takes 7/10ths of a gallon of gasoline to produce 1 gallon of ethanol, this means that in addition to the 775 gallons of gas I'm burning in the blend, the ethanol makers are burning another (70% x 87, or) 61 MORE gallons of gasoline. So by running pure gas, I drive 25,000 miles on 675 gallons of gasoline, but by running the blend, it's burning (775+61=) 836 gallons of actual gasoline. Everyone, literally everyone, I've talked to has noticed a similar 12% to 20% reduction in their fuel economy when running the ethanol blend. Multiply my numbers by the number of individuals who are now running the blend, and tell me, please, how this is helping reduce consumption of real oil? Surely, the American public is not as stupid about accepting this as it would seem. Surely, the public is not letting elected Congressmen get away with such an asinine idea as this ethanol joke seems to be. Surely, the American press is not as insane as their silence on this issue makes them appear. So what, what, what on earth, what in heaven or hell, what, am I missing about this? Where is the change in mathematic principles that makes using 775 gallons (or 836 gallons) a REDUCTION from 675 gallons? Since my mileage figures (and Dubby's, and EVERYONE else I've asked about this) are far beyond question, the answer must lie with some kind of new mathematics or something. Anyone?