I get that 15 mpg only when towing -- that is, the powertrain is working relatively hard. If I get approx. 10% better fuel economy then -- what kind of change (plus or minus) might I expect for the vast majority of the miles I drive at light load? 60 tanks of fuel towing will take me a couple of years to travel. That's fine -- at least it's a known known, The unknown known is whether I can expect an increase in range when driving around without the trailer. A "yes" answer, preferably one that tells me I'll see similar positive results, will be the make-or-break for whether I buy one.
Installation? One hour? Lots of drilling and machining? Four hours of shop labor at my local garage 'cause i don't handle tools real well? Fits right under the hood -- if I remove the inner fender?
I expect others might be gleaning some information from your responses to my questions, so I'm not asking just to assuage my idiocy. Two final questions -- delivery time after receipt of order? and Do you accept credit cards?
At 15 mpg, your range is 375 miles. This equates to $.20/mile traveled.
After water/methanol: Filling up your tank still costs the same but with a 1-2 mpg increase your range has increased to 425 miles.
Jon say 425 miles on a tank and 60 tanks that is only 25,500 miles. I'll bet you will do almost that this year alone going to the salt and Maxton. Even if it is a 10% savings that is a pretty good return on your money in one year. Nate also mentioned $3.00 a gallon fuel, good luck on finding that any more.