Hello,

Go ahead and do the math, but I still recommend that for ultimate accuracy that you employ a GPS.

Did you know that your odometer actually goes backwards when you back up?

You won't have that problem with a GPS as it will just add up your total distance traveled.

And when you combine all the variables, I guarantee your math will not be as accurate.

With the data from a GPS, you will able to accurately calculate your fuel mileage and more importantly you will be able to determine what offset to add/subtract to your speedometer readings so you know how fast/slow you are actually going down the road.

You probably know someone that has a GPS.

Some pilots have one or know someone who does.

People who go hiking, hunting, fishing sometimes have them and off and onroad recreational vehicle users might have a GPS.

--
Eric
Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
Torrance, CA 90501