So how 'bout that Ecometer by Auto meter?

[ezhacker1]

Originally Posted by R2D2

The ecometer calculates mpg anytime the engine is running, including while idling. You can watch your avg mpg drop as you idle. It is very accurate-mine has always been within .7 mpg or so of calculating by the "pump method" at fill up.

Today at fill up the ecometer was dead on! 35.3mpg was the ecometer reading, 35.323 was the calculated at pump. No DFCO, just lots of nuetral whenever possible, id say 20% highway rest city. I have yet to take the car on a long trip highway run. the longest iv done is 44 miles one way, got 44.52mpg that time. Car is still under 4k on the odo.