How ever much it needs to be sparkly clean! ;)
4 - 5 litres per car ...
You can actually do it with 2 buckets of water. One to wash the dirt off and one to rinse the chamois leather as you're drying it off. Any Chauffeur will tell you that.
For each foot the water rises up the side of a car, the car displaces 1500 lbs of water. In effect, the automobile weighs 1500 lbs. less for each foot the water rises. Typically, two feet of water will carry away most vehicles.
As many as 140 gallons of water can be used when washing a car at home. The actual amount may vary depending on the length of the car wash.
Wash your car on a lawn.Use a bucket rather than a hose.
Soap and water
washing a car
It depends on how long a person spends washing their car. When using a self-service car wash with high pressure hoses, the amount of water used is about 3.5 gallons per minute. Washing a car without high pressure hoses uses about 8 gallons per minute.
over 9000 roughly...
Nothing
10 to15 or 0 to 10
you can wash it on your lawn, that means your lawn will get watering