Ok, cool. With about .33 mpg saved that would add up. This week I only did about 2500 miles. Last week was about 4000 and the week before was closer to 4500 miles. I've had some big weeks lately. So at 3500 miles, $3.50 per gallon, 17.0 to 17.33 mpg move, I'd save $14 per week.
I like that...