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I use 3oz for 4 gallons water. The lubricity is great from my experience.
I like Mr pink scent only and love wonder wash :D
Citrus W&G dilution and foam is great but not enough lubrication for me,...

CG soap smell great and looks cool.
It also comes with nice 16oz bottle which can be recycle to use with tolco sprayer :D
Nevertheless, my go to soap is Meguiars hyper wash and gold class... Lol