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Last night and this morning the air temperature was around 40F - enough to slow the warm up.

Noticed that my ScanGage records my water coolant temperature much better than the idiot gage in the dash. Normal Summer operating tempature is 195-197F. I got to 182F very slowly, then it jumpt up to 197F by simply turning the heater off. Went back and forth and so did the temperature.

My conclusion is if you can stand it, keep the heater completely off the first three miles, longer if it drops below freezing to maximize fuel economy.

I agree with that to some extent. There is no point turning on the heater if the car isn't warmed up.

The only caveat is that the battery in hybrids isn't as efficient until it gets warm. You might want to juse a little heat to try to raise the temps a little without dropping the coolent temps much.

I was driving along this morning and thinking about you guys. It was 38º and I have yet to turn on my heater. I was going to make a post asking just how low you tolerate in turns of outside temperature before you turn on the heater.

Hi Tony:
I was driving along this morning and thinking about you guys. It was 38º and I have yet to turn on my heater. I was going to make a post asking just how low you tolerate in turns of outside temperature before you turn on the heater.
___I usually will drive into the single digits before using heat unless I have to clear the windscreen (without A/C for defrost) but it depends entirely on how dedicated you are. Care to guess what that makes some of us ;)

___Good Luck

___Wayne

I was going to make a post asking just how low you tolerate in turns of outside temperature before you turn on the heater.


Heaters?........We don't need no stinkin' heaters.......:D

Randall

Heaters?........We don't need no stinkin' heaters.......:D

Randall

its called a big fat coat and a good seat cushion (mines memory foam) which holds body heat very well. Depending on how good my day is, I'll open the windows to defrogg instead of using the defroster.

Heaters?........We don't need no stinkin' heaters.......:D

Randall
Or any stinkin AC?

I don't know. I think the car needs heat more than I do. I sometimes turn it on just for the battery ;)

I'm still playing with it to see if it makes a difference.

But normaly around single digits I'll start stealing a little heat at stops signs.

As I posted in another thread, this is one of the instances where being a woman in my 50's works to my advantage - I seem to be constantly generating more heat than I need! :D:D

A little bit of heat seems to leak out of the vents in most cars
whether you're running the fan or not, and once that enters
the confined space it seems to provide enough for reasonable
[albeit well-dressed] comfort without having to pull any more
out of the engine. Maybe a bit less so in "recirculate" since
the outside wind-blast pushing inward is cut off.
.
This is probably where the block heater will come in real handy.
I put mine into the Pri this week and still need to do up the
web-page about it..
.
_H*

I need my heat and A/C!!!

Maybe a bit less so in "recirculate" since
the outside wind-blast pushing inward is cut off.

HMMMMMMMMmm i wonder if recirculate would speed up warm up time? Lol I heard you can't use that mode for long, since something about the battery in the back needing ventilation unless you want to be inhaling some 12 volt hydrogen gas, correct me if I"m wrong.

What I did notice though, sometimes werid, that hitting recirculate sometimes turns the engine on/off when i'm at a dead stop.