Hi, the product I use comes in 5 Litres, I obviously do not use on every car but the occasional 1/2, I purchase mine with other cleaners I use, If its just a simple clean, use Fairy Liquid but note """" Just a drop""""" & before anyone jumps up and say rubbish, I have been doing this for Years, as said, in my spare time with NO problems/stains nothing, but as soon as the dirt gets removed wipe down with clean water, My own car has Light Grey Leather this is what I do with (A1) results.