On July 12 for the Washtenaw match, I decided to take it easy on the gas pedal. My wife got me a little hand held map reader/gps which shows the expected time of arrival. Using that and setting the cruise control, I was able to see what my arrival time would be. I set the cruise at an indicated 65 on the speedometer and the gps said it was 61 mph. Turned off the air conditioner since it was nice out. The travel time said 3.5 hours and it would get me there at 8:30 am (just in time for the gate to open).
Filled the tank with diesel (it's a Golf Turbo Diesel). Filled up on the return. The calculated mpg was 52. It used 1/2 tank; usually going 65 to 75 it would use 5/8 tank. Probably saved 2 gallons of fuel and about 9 dollars. By getting on the turnpike one exit later and exiting one sooner, it saved another $2.00 in tolls.
Driving to the match is still the most expensive thing. The ammo is about $12, the entry fee is $15 and the transportation with fees is about $46. Shooting with good friends...Priceless!