Wondering why people complain that Yaris' cant get good mileage?!

[yarrr]

Originally Posted by BailOut

This is inaccurate. In both testing with our SGII's and as proven in the 3rd season of the Mythbusters television show, windows down is always more efficient than a/c at any speed.

In fact, with the SGII it is nigh impossible to read the drag hit of having the windows down, but turning on the a/c at any speed is an instant large and sustained hit to FE.

uh.

http://en.wikipedia.org/wiki/MythBusters_(2004_season)

Myth statement
Running a car with air conditioning on is more fuel efficient than running with the windows down.

Status
Partly Busted

Notes
Tests were performed under varying conditions (55 miles per hour (89 km/h) versus 45 miles per hour (72 km/h)). Also, the 55 mph test was using a computer to estimate fuel efficiency based on air intake, not actual fuel consumption, and showed A/C was more efficient. The 45 mph test consisted of running the tank until it was empty, and showed open windows were more efficient. This experiment—or one like it—is sometimes cited by the Magliozzi Brothers on Car Talk when presented with this question.


http://en.wikipedia.org/wiki/MythBusters_(2005_season)

Myth statement
Running a car with air conditioning on is more fuel efficient than running with the windows down. (From AC vs. Windows Down)

Status
Partly Re-Busted/Partly Confirmed

Notes
The fundamental flaw in the MythBusters' test was that the point where the drag becomes powerful enough to inhibit a car's performance with windows down was inside their 45–55mph margin at 50mph. Going less than 50mph it is more efficient to leave the windows down, but going greater than 50mph it is more efficient to use the A/C.



The sad thing is I just pull stuff out of my ass most of the time, you write novels on this crap.