I've used many car wash soaps over the years and I find that Griots carwash soap is the best. You need about 2 oz for a standard wash bucket (I have the one from Pep Boys) and filled about 3/4 of the way. This products is VERY concentrated, so it will last you a long time, so don't let the $30.00 a gallon price scare you, trust me, this is what your looking for.