Originally Posted by outceltj
Is that from the inboard computer or hand calculated
Although there are a few of the 05 thru 10 onboards that are pretty accurate, the vast majority are off by 1-2 MPG (high). There was a lot of input on this from the forum members over the past few years. Unless you hand calculate, at least for the first 50-100 fill-ups, AND reset the onboard at each fill-up you haven't a clue what your actual fuel mileage is.
My '07 GT is off by 1.5-2 MPG.
My '08 Toyota SUV is off by 2-2.5 MPG.
My wife's '06 V6 Pony is off by about 0.2 MPG
As long as you're cruising in the sweet spot (which is often around 1500-1800 RPM), fuel mileage can be awesome.