if adjust the aircon temperature panel to 16c (max), the compressor will keep running in order to reach the temperature, it will cut off itself once reached 16c... if for those car which their aircon not efficient, maybe the max temperature itself can go only 22-25c but adjusted to 16c, so the the petrol will waisted for nothing...

for aircon efficiency, we can try to adjust to max temperature... when we felt cool on certain temperature (assume 25c), try to increase by adjust the temperature panel slowly till the compressor cut off itself... once it cut off, then the level of the temperature panel was around 25c, compressor able to cut off itself and we feel cool and save fuel too...

but once we on aircon, for sure compressor will on and off repeatable even increase the temperature panel level which are not cool at all under sunny day... unless we dont on aircon at all, for sure dont have any wear and tear on compressor...

EDIT:
actually not 100% not wear and tear... the compressor belt still attach with engine even the compressor not working

This post has been edited by gkl83: Feb 8 2007, 09:17 AM