Elky Pro Rug Shampoo & Soil Extractor is formulated to work effectively at high (and economical) use dilutions. Extensive field testing with the help of professional operators has resulted in the following dilution guidelines. Light Soil: 1-50 (2-1/2 oz per gal of water); Medium Soil: 1-32 (4 oz per gal of water); Heavy Soil: 1-24 (5 oz per gal of water); Rotary Machines: 1-50 (2-1/2 oz per gal of water); Depending on soil conditions: Dry Foam Machines: 1-24 (5 oz per gal of water); Manual Shampooers: 1-16 (8 oz per gal of water); Upholstery Cleaning 1-16 (8 oz per gal of cold water)