me once a week.

never ... because i don't have one
haha

as least as possible

you see the thing is that we should learn to conserve water. There are still millions or may be couple of billion people on this planet who do not have access to potable (drinking) water.

This is the same water we waste in activities like car-washing etc etc

My message or answer would be conserve it.
Once a month may be a better choice

not enough, sometimes in the summer, but I should wash it more ,my old truck ended up with the rocker panels rotting off cuz I didnt wash it very often.But who cares about a stinkin` Z34 anyway?(just kidding)

I usually take it to the car wash atleast twice a month.. and I sometimes do the cleaning.. uhm.. every 2 weeks