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Old 08-17-2007, 12:42 PM
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bwilson4web bwilson4web is offline
Engineering first
 
Real Name: Bob
Location: Huntsville, AL
Hybrids: Prius Classic 03
Posts: 5,040
Wink Re: Hi/Low fuel mileage

Quote:
Originally Posted by ED 1934 View Post
Gentlemen, I'm brand new to the forium and I have two Priuses and while going through all these statements I have read about fuel mileage, I have a few questions.
Welcome to the club! (BTW, we have most excellent lady experts too.)
Quote:
Originally Posted by ED 1934 View Post
1.Is the fuel mileage based on a full tank?
No as long as the method gives reasonably accurate numbers. Click on my Prius signature block and you'll see that until recently, I was doing two fill-ups per week. This let me keep my commuting mileage separate from my weekend mileage and fairly quickly identify what works and doesn't work.
Quote:
Originally Posted by ED 1934 View Post
2. Is the fuel mileage based on hypermiling for a mile or so, such as 80 MGP during that time and mileage?
Using shorter intervals requires attention to detail to make sure the car is in the same state before each run. I've got a Graham miniscanner and know how to 'normalize' the car. It can be done but it takes attention to detail and you really need to make multiple runs to make sure the results are reproducible.

I find the biggest challenge is making sure the car is properly warmed up. As a general rule, I prefer to run at speeds above 42 mph for at least 20 minutes.
Quote:
Originally Posted by ED 1934 View Post
I'm doing my darnest to keep my hwy mileage above 53 over a 40 mile round trip in my 05, . . .
If you warm-up the car before highway speeds and keep the cruising speed around 65 mph, you should be in good shape. For good measure, take a peek at the FAQ in the Prius forum. For an 05 Prius, you might also want to have your alignment checked when you next rotate the tires.

Bob Wilson

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