Premixed All-Season Shampoo Formula Use with JE Adams Shampoo & Spot Remover Vacuums & Detail Stations. Shampoo & Spot Remover dispenses 2.5 gallons of foam per minute, which is equal to 1 oz of liquid formula. 1 gallon of liquid formula = 128 oz and the dispensing rate is 1 oz per minute. One gallon of liquid formula yields 128 minutes of vend time.