Dave ~ I bet you could get 2-1/2 hours between stops if you would just keep your foot out of her!!! Your scientific assessment of the gas mileage just sounds like a plot to get you out of the house for a few hours. But hey man, if they fall for it......more power to you
I tried that same story once but my girlfriend said that she had better follow me in case I ran out of gas. I thought "great idea".........I shifted out of 3rd and haven't seen her in 3 months!!!!
Brian