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Frustrated prius believer question - Page 4

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Posted by Bob Wilson on December 29, 2006, 4:28 am

Last winter, I modified my route to extend how long I drove at 25 mph
until the blue 'coolant' light went out. This made a significant
improvement in mileage:


This year, I learned about a thermistor hack for my NHW11, 03 Prius, and
have been testing a manual version. So far, it looks to be pretty
effective but I'm trying to get a microprocessor version working to
capture some quality data:


Bob Wilson

Posted by Rich on December 29, 2006, 2:01 pm

Bob Wilson wrote:

Wow Bob, those are some really detailed stats...nice work.  I did the
modification with my commute distance and added and extra 12 miles, and
it does help slightly.  I went from 38-39 mpg to 42 mpg.  My climate
change since moving is ~7-10 degrees colder than before, but if that
makes such a big deal with respect to the overall mpg, I might look
into the hacks you've mentioned, because my last car (Honda Civic) got
33mpg, and makes me doubt the Prius a bit.  Just a bit.

I also have 23000 miles on it in 13 months, and have done the following
things: oil changes at ~6500 miles using Mobil 1 10W-30, tires have
been rotated 3 times and that's pretty much it.  I don't know if there
is something from Toyota (or myself) that needs to be "maintained" at
this mileage, but it's starting to look like it though...

Thanks again for the stats...

Posted by on December 31, 2006, 2:05 pm

Yep, you should. You see, if you don't, you'll be wastefully speeding up and
slowing down as you approach pedestrians you didn't see until you were
almost on top of them. (Assuming cold dark mornings)
We all know the first twenty minutes are not fuel efficient.  Let's say your
ride to work last 20 minutes. If you let your car warm up 5 minutes that
means the last 5 minutes are fuel efficient (5 plus 20% total operating
time). So, the last five minutes makes up for the first 5 minutes.
Theoretically, you could let your car warm up 20 minutes which would make
your whole trip to work fuel efficient.  Can't argue with that. But I'm sure
somebody will.

Posted by on December 30, 2006, 11:43 am

Higher elevations tend to reduce mpg. Did you not read "Limited
Participation" post replies?

Posted by Rich on December 30, 2006, 3:33 pm

mark_digital wrote:

Higher elevations would be a factor except I live 5 minutes from the
beach...even before I moved, I was very close to sea level.  What is
this "Limited Participation" you are talking about?

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