Wow, I haven't gone above 1.5 oz yet. I thought I had seen people get results with 1oz but for me it's been more runny than I'd like. Man that kinda takes some of the fun out of it, knowing its so $$$. Using 1oz per 3-4gal two bucket wash comparatively. Meh....whatever its still fun lol ... and effective as a light wash
I'd be curious to find what the most economical (lowest oz per- while still effective) soaps.
I had better coverage with blackfire soap than mckees power wash at the same 1.5oz. Blackfire actually foamed ok and stuck mostly at that dilution rate.