Hybrid Car – More Fun with Less Gas

Fall and Spring, prime Prius weather

register ::  Login Password  :: Lost Password?
Posted by bwilson4web on September 19, 2011, 7:40 am
Over the years, I've plotted MPG vs temperature and found 80-85 F is
an ideal temperature. Temperatures below 55F require longer warm-up
and above 85F often require air conditioning. But between 55-85F, is
the Prius sweet spot.

So today I ran various errands around town: dogs to the nature trail;
shopping at Costco; late lunch at Ed's Pizza; and home again. Being a
Sunday, we didn't have enough pickup trucks towing lawn equipment in
trailers on the Parkway. So I pulled on to the access roads and just
enjoyed the day.

While I was enjoying the drive, I thought about how much we appreciate
our fuelish SUV and gas guzzler owners who pay so much in road taxes.
Of course, it is only fair because they tear-up the roads. There is
justice in their paying the price of their fuelishness.

Bob Wilson

Posted by Leftie on September 19, 2011, 10:02 am
bwilson4web wrote:

   Let's be realistic: most people are going to run their A/C long
before it hits 85F. In fact, you are *supposed* to do so, to keep the
battery pack cool. I've found that using the A/C in Eco mode (it cycles
less often and produces a more "cool," less "cold" air stream) makes
little difference in MPG, however. Above about 83F we can get 55MPG
average. below that it's 53-54. Below 50 the mileage starts to take a
real hit.

Posted by Elmo P. Shagnasty on September 19, 2011, 11:04 am

ever run several weeks at 10 degrees F?  With high winds?

Posted by News on September 19, 2011, 11:19 am
 On 9/19/2011 7:04 AM, Elmo P. Shagnasty wrote:

What's the MPG hit in the northern winter?  Are they still skittish in

Posted by bwilson4web on September 19, 2011, 12:56 pm
Here is my graph of MPG vs temperature:

But once we morning temperatures under 70F, I put my radiator block
back in:

Not only does the engine warm-up faster but it reduces cooling air
drag. A lot of NHW20 owners use pipe insulation in the front grill.

I understand there is stiffening plate that can be bought for the
NHW20s that improves handling. I has not been a problem with our
NHW11, the sedan body, nor the 1.8L ZVW30. But then my driving tends
to be relaxed, less stressful.

Bob Wilson

This Thread
Bookmark this thread:
  • Subject
  • Author
  • Date
please rate this thread