"Kathy and Erich Coiner" > wrote in message
news:byhve.1095$4M1.107@trnddc07...
> 1. Fill Tank.
Correct.

> 2. Record mileage.
Correct.

> 3. Drive car till near empty.
Sorta. Drive as long as you want and refill the tank anytime you want.

> 4. Fill tank again. Use same pump at same station. Let the auto shutoff
> system work. (Do this on initial fillup too. Record gallons to fill
You make this much more difficult than it needs to be. All that is needed is
to fill the tank where ever it is convenient to get gas.

> 5. Record mileage.
Correct.

> 6 mpg= (mileage step 5-mileage step 2)/gallons used step 4.
Correct. Repeat from Step 3.