I have had my Prius for 10 days now, and of course I love it. It's hands down the best car I've ever had. And I downloaded the user's guide that's suggested in the "taking delivery of a prius" guide. It mentions that you can find both your lifetime MPG and MPG for your current trip or tank of gas. I can't find the button for lifetime MPG. Any hints on where to look for that? Thanks.
Hi Speedy, Welcome to the world of Prius! I hope your car is meeting your expectations. There are a number of inaccuracies in the owner's manual with regards to features. One of them unfortunately happens to be the lifetime MPG. Hopefully, there will be a software upgrade available in the future to include that feature.
<div class='quotetop'>QUOTE(randalla\";p=\"87218)</div> I don't. Sorry to be blunt, but when you reach the mileage I'm at, you'll discover the curse that wish would bring... The margin-of-error (1.4 MPG) is greater than the annual variance, making a display lifetime value pretty much worthless and definitely misleading. Looking at these year #2 graphs for both my Prius, it becomes obvious. Notice what doesn't happen to the green line. http://john1701a.com/prius/prius-data04.htm http://john1701a.com/prius/prius-data13.htm Then note how it gets even worse as the year's progress.
I'm not sure I follow what you're saying about the 1.4 mpg margin of error and the annual variance. I know I wasn't a good statistics student, tho'. Do you mean that after a year or 2 the Lifetime MPG becomes close to a straight line but that it's y-coordinate is deceptive in that the margin of error is 1.4 mpg? I know for me the lifetime average would be a source of frustration. Like the poor person who tries to make up in one semester what 3 years of partying did to his GPA. (just anecdotal, not personal experience :roll: ) After a few years, you could drive like that guy who went over 1000 miles at 35 mph and still not get your Lifetime average to budge. I hope I haven't added more confusion to the confusion.
Margin-of-Error is the difference between DISPLAYED and CALCULATED values. The Multi-Display rounds optimistically. So we know for a fact that it will read higher than actual. And yes, it becomes a flat line after awhile... which varies less than 1 MPG. So rarely ever seeing a change and realizing that it isn't entirely accurate anyway would be very frustrating.
