Yes, Over time the salt in the water will cause the vehicle to rust.
the car works when you add salt water in the car. the magnesium reacts to the salt water.
4 - 5 litres per car ...
Wash your car on a lawn.Use a bucket rather than a hose.
Soap and water
washing a car
Nothing
over 9000 roughly...
It shouldn't if the paint was put on correctly. I presume if it's hot it's sunny. Don't leave your wet car out in the sun. It won't damage the paint, but it will leave water-marks (I don't know the technical name for it, if there is one....) from where the water dried. Hope this helps.
How ever much it needs to be sparkly clean! ;)
you can wash it on your lawn, that means your lawn will get watering
Usually that is possible. If you've been drinking it, it's OK for washing a car.Usually that is possible. If you've been drinking it, it's OK for washing a car.
No most tend to water down the soap.