Save the world, lose a marriage?

Have you been hitting the reset button when each driver changes?

You need to reset one of the trip buttons and then reset the consumption each time you change drivers.

 

<div class='quotetop'>QUOTE(screaming red @ Apr 4 2007, 12:45 AM) [snapback]417488[/snapback]</div>

Yes, when you get in the car and start it, for the first 5 minutes you'll get in the 20's for mpg so your average will always go down when you start it, and nurse back up while you drive.

If your comfortable with a little math there is an equation you can use use to calculate the "trip" mpg without resetting the tank mpg. Here's how it works. Write down the miles (tank) and MPG at the start and end of each trip. You can calculate how many gallons of the tank you've burned by miles/mpg.

So to get your trip MPG you simply determine how much gas was burned before and after your trip, assuming you know the miles driven, now you have your miles and gallons to calculate miles per gallons.

The equation is as follows.

Given:
Gallons_Burned_From_Tank = Tank_Miles/Tank_MPG
MPG = Miles_Driven/Gallons_Consumed
Gallons_Consumed = Gallons_Burned_From_Tank_end - Gallons_Burned_From_Tank_start.

therefore:
MPG_Trip = mi_Trip / (mi_tank_end/MPG_tank_end - mi_tank_start/MPG_tank_start)

Clear as Mud? Try plugging it in to excel and you should get good results. It will also give you a nice trip log so you can tell if your MPG is improving over time.

11011011

 

It's always going to be a little imperfect, even with Dan's method of figuring trip MPG. That will be close, but really the only way to do it right is to buy a second Prius

 

When you get REAL good at doing the mileage thingie with practice, you can get your 1st Five minutes of driviving up into the 40mpg's ... and THAT's what really raises your average ... expecially on those short 10-15 minute trips.

 

I think in california there is a checkbox on the divorce decree...

"Can not agree on Prius MPG accomplishment"...

Sorry you're from Idaho, you're just going to have to live with this....

:lol:

 

<div class='quotetop'>QUOTE(Ichabod @ Apr 4 2007, 07:17 AM) [snapback]417551[/snapback]</div>

Yes. But then to be really fair, you'll have to trade off with your wife every once in awhile so she can't claim you have the "better" car.

Dave M.

 

<div class='quotetop'>QUOTE(Dan. @ Apr 4 2007, 08:28 AM) [snapback]417533[/snapback]</div>

The first 5 minute bar is basically the "warm up period". Hence the increase in mileage with the block heater. It warms up the car before you get in and drive, so the first bar goes up from the 20-25 range to 40-45 range. My mileage went up a great deal since my EBH install.

Also, time and experience driving the car are invaluable assets. I've been experimenting with alternate routes to and from work to try and find the one with the best mileage.