i know that somewhere in here is the formula for figuring out gas mileage without running the tank dry can anyone tell me how to do it right so i can figure it out thanks for your help

 

go to the station fill up that tank to full.. reset the trip odo.. drive around till its like 1/4 left then fill it back up to full

say you have 200 miles on the the trip and you just put in 11gals

200/11= 18.2mpg

 

just click your mileage button to where it's on zero, then when you get gas fill it up. Then divide your mileage by the number of gallons you put in.

damn I'm always getting beat.

 

thanks didn't have time to look for it on here i will do that next time i fill up

 

What has been said will give your mileage for that tank of gas.. which is usually more than enough for most of us. If you want to go that extra mile, do this across more than one tank.. or better yet, keep a fuel log in the truck at all times. Record the amount of fuel pumped (gallons) and the odometer reading every time you fill up. Then you can compute the averages over time or the total mileage between any two fillups (sum of miles driven / sum of gallons pumped for all fillups between). I usually write down the total dollar amount of the sale and the date so I can track fuel costs as well.

Every now and then I enter the data from the log-book into an excel spreadsheet and let it crunch all kinds of interesting statistics for me. I even posted that spreadsheet here on RF.com.

I've been called obsessive about this though..