I read somewhere that, on recent model (better streamlined) vehicles, at
high speeds you may get better mileage with AC-on/windows-closed that you
would with AC off/windows-open. It explains that open windows disturbs the
streamlining greatly increasing the drag to the point that it draws greater
engine power than the AC. I haven't tried it myself - just wondering if you
folks have experienced this.
> >The best my '00 TL has never done was 33 MPG, and that was only once and
> >involved driving out an entire tank of gas non-stop from fillup to empty on
[quoted text clipped - 4 lines]
> I agree with your best -- 33 at 78 w/o A/C. Back and forth to
> work, I average between 24 and 26.
Lee Florack - 07 Sep 2004 23:00 GMT
>I read somewhere that, on recent model (better streamlined) vehicles, at
>high speeds you may get better mileage with AC-on/windows-closed that you
>would with AC off/windows-open. It explains that open windows disturbs the
>streamlining greatly increasing the drag to the point that it draws greater
>engine power than the AC. I haven't tried it myself - just wondering if you
>folks have experienced this.
Yes. That study is true. If I drive over 50 mph, I close the
windows to keep the car as streamline as possible. If it's too
hot, the A/C goes on -- it's still more fuel efficient than
opening the windows.
E. Meyer - 08 Sep 2004 05:05 GMT
I've read that too. It doesn't seem to pan out in real life. This car has
make the same trip with the windows closed and the AC on. The result was 3
mpg worse mileage. Apparently, at least with this TL, the increased drag
from having the windows open requires less energy to overcome than the
increased load on the engine from the AC.
On 9/7/04 12:47 PM, in article t-ydnTNgRs-yaaDcRVn-rw@comcast.com, "Batong
Buhay" <batong.buhay@comcast.net> wrote:
> I read somewhere that, on recent model (better streamlined) vehicles, at
> high speeds you may get better mileage with AC-on/windows-closed that you
[quoted text clipped - 13 lines]
>> I agree with your best -- 33 at 78 w/o A/C. Back and forth to
>> work, I average between 24 and 26.
Fluffy - 08 Sep 2004 22:38 GMT
I drive an 87 automatic 5-door and get between 24-26 mpg on an average
fill up. When I was in high school, I got about 20 mpg climbing over
the really steep hill back and forth to school. I've had about 32 mpg
drivin' interstate from one gas station to the next gas station. I
think it really depends on the elevations in the terrain, your driving
style, and whether you have the AC on all the time. For me, though,
AC is a non issue since when I got the car the pump didn't work, it
had no freon, and I'm sure the hoses have gone the way of the dodo
without use for 6 years.
Art M - 13 Sep 2004 22:26 GMT
>I drive an 87 automatic 5-door and get between 24-26 mpg on an average
> fill up. When I was in high school, I got about 20 mpg climbing over
[quoted text clipped - 5 lines]
> had no freon, and I'm sure the hoses have gone the way of the dodo
> without use for 6 years.
You could always try one of those $35 kits from K-mart that converts an old
system to the new one. It also recharges and has some stuff in it to stop
slow leaks. I used one on a '79 Toyota Cressida and it lasted a couple of
years before I junked it.
--Art