Does anybody check the computer calculation for MPG to see how accurate it is? I checked mine and the computer appears to be overstating the MPG by about 7 Miles. (You know how to check MPG manually right? Fill tank - Set Trip Odometer to 0 - Drive around - Fill tank back up and divide your Odometer miles by the amount you added to the tank.)
There are a number of threads addressing this issue. The two longest-running and best able to address your concern are the following: 2010 calculated vs. computer MPG - Please post your results (This thread is actually a "Sticky" that shows up at the very top of the forum.) 2010 Toyota Prius FCD Inaccuracy Other threads recently started on this topic include: Discrepancy between electronic mpg number and "actual" mpg number??? MPG guage accuracy gas mileage These are the threads related to the 2010 (GenIII) Prius. There are several other threads on the topic as relates to the GenII Prius, but there are different issues involved. Please do a search to find out even more about this issue.
The more EV mode driving and higher mpg numbers seem to be further off. I've got a little over 2600 miles and my lifetime computer avg is around 47.5 and my calculated is about 46.
Overstating by 7 miles over what distance, or did you perhaps mean that to be 7 miles in a gallon? Tom
Our indicated ios consistantly 3 to 4 MPG better than actual. It's misleading. Should be fixed. I've had to stop telling people I get 50 MPG.
