Stupid question probably, but mine keeps going up and down. Why.. and is it legit.. like is that number what the actual mpg is?

 

It runs off of variables like tank level, accelerator position, speed, etc in real time...not the most accurate on a trip.

You're better off keeping track of your mileage on a per tank basis...(reset trip counter at fill up...pay attention to how many miles you went when you fill up again and divide by # of gallons)

 

:d

 

I tested the accuracy of my dashboard mpg counter. Twice, actually. It's somewhat accurate, but it's definitely not perfect. It fluctuates around a lot due to all the variables it calculates to achieve it's decided number. When I tested it, it said I was getting 29.8, but according to my math after filling up I was actually getting 29.2 or something like that. I have it written on the receipt, I just can't be bothered to go get it.

In any case, it's not so inaccurate that it will give you a completely outlandish number, but it's definitely not pinpoint. It's best used as a motivator to lighten the load on the pedal on the right a bit, in my opinion.

-Nathan

 

Mine's highly optimistic. It usually reports 2-3 mpg above what I'm actually getting.

 

 

29?! Why the hell is mine at 21..

 

Sh*t he must have a tailwind and be going 50!