I purchased optimum trial packet yesterday and washed with its car shampoo today. Most car shampoo that I have used, suds or foam die off soon and is like washing car with simply just plain water.
Was quite amazed that this optimum car wash is very concentrated, producing lot of foam. I filled a 4 gallon pail of water with 1 1/2 capful shampoo.
GPGT.
Finished washing