mpg meter

ive been lookin and askin but i cant find out what that meter is called that measures the gas milage that ur gettin. does anyone know what that is called?

theres a meter for that?

i know some cars have those stock, but i've never seen an aftermarket one. it's easy enough to just divide miles by gallons and get an average mpg.

yea but u dont kno what ur gettin at a certain time

i dont know if theres an aftermarket for that kind of meter. i know they come stock on most GM vehicles, but never seen an aftermarket one

Well there is a reason that you probably wont find many aftermarket ones...they need to be made specific for the injectors and the injector pattern of your car.

http://www.yarchive.net/car/mpg_gauge.html

this is an article that may help you understand...I know they have been on some high-end German luxury cars, but my guess is that they are hooked to a vacuum line and are strictly 'guesses'...just like my factory boost gauge in my vr4.
I sincerely doubt you will find an aftermarket one...if you do, I would doubt even more that it's worth the plastic it's made out of, and even further, if you do manage to find a highly accurate aftermarket one that monitors your specific injectors...then I'm guessing it'll cost $$$

Why would you want top know what your milage is anyway's? as long as my gas gauge reads full, and i know where the next gas station im happy.