Recently I began using a mileage computer known as UltraGauge. See here: ultra-gauge.com
It provides all sorts of mileage data like Instantaneous MPG, Average MPG, trip MPG, Instantaneous Gallons/Hour, Ave G/H, etc.
It does not take long to learn which driving behaviors suck the gas. In my case the rig I was driving was reported to get 8MPG, but by using this gauge, and adjusting my driving, I easily pulled 15+MPG.
It provides all sorts of mileage data like Instantaneous MPG, Average MPG, trip MPG, Instantaneous Gallons/Hour, Ave G/H, etc.
It does not take long to learn which driving behaviors suck the gas. In my case the rig I was driving was reported to get 8MPG, but by using this gauge, and adjusting my driving, I easily pulled 15+MPG.