So Ray, you've never been curious what mileage your gettin'? Maybe it's 'cause I live where gas is just about the most expensive in the nation that I'm worrying about it. And my truck is my primary driver.
You don't need no stinking gas gauge to figure your mileage. Fill her up. Write down your odometer reading. Drive 150 miles. Fill your tank again. Divide 150 by the gallons of gas you just put in. It's more accurate the closer to "E" you get but, you probably don't want to run out of gas. Or, that's where Bill's stick idea comes in.
-David