Achieving 20-22MPG
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#79
It's better if you keep track over multiple tanks. So do 10 tanks of gas and divide by the total mileage over that period.
When y'all put bigger tires on do you re-calibrate your odometers? If not, that will make it seem like you're getting lower gas mileage than you really are. Hit the trip button when you drive past a mile marker on the interstate and see if you're rolling past another in 10 miles as the clock rolls to 10.0. If not, then make a note of what it says, and you've got a conversion factor for future reference. If you go from a 28" tire to a 31" tire, you'll cover 10% more distance with each turn of the tire, but the odometer won't know it.
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#84
Here's what mine looks like. I actually just have a little notebook in the truck that I write my gas purchases, plus any maintenance into. I only type up a spreadsheet on occasion to see how it's doing. It's more a way to remember when I change the oil than anything.
The second set of calculations, on the right, is a rolling average over two tanks of gas. When you do that, it smooths out the measurement error, and minor changes. You can see I got between 20 and 21 MPG in March. For the whole period I drove 2422 miles on 118.19 gallons -- 20.5 MPG overall.
The second set of calculations, on the right, is a rolling average over two tanks of gas. When you do that, it smooths out the measurement error, and minor changes. You can see I got between 20 and 21 MPG in March. For the whole period I drove 2422 miles on 118.19 gallons -- 20.5 MPG overall.
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