Maxodyne Flushing Oil Super Concentrated Engine Flush can restore pristine cleanliness to the dirtiest of both diesel and gasoline engine internal components, and has saved thousands of engines from expensive rebuilds. Maxodyne Flushing Oil Concentrate is a remarkable product, and is possibly the most effective treatment in removing harmful and performance draining sludge, hard carbon and other contaminants and deposits from oil-wetted engine components. Not only does it restore full cleanliness to the entire crankcase, removing all engine sludge, but it also frees up stuck piston rings, restoring compression and oil control. Contains no abrasive or corrosive solvents. 8 fl oz treats a maximum of 16 quarts (4 gallons/19 liters) of oil 16 fl oz treats a maximum of 32 quarts (8 gallons/38 liters) of oil 32 fl oz treats a maximum of 64 quarts (16 gallons/76 liters) of oil 64 fl oz treats a maximum of 128 quarts (32 gallons/151 liters) of oil 1 gallon treats a maximum of 256 quarts (64 gallons/302 liters) of oil Use it now before it's too late! Restore your engine to like new cleanliness and performance. For the very best results; Initial, heavy duty, concentrated flush: Warm up the engine oil, then drain. Add new oil to then engine, run engine a few minutes to warm up, then add Flushing Oil Concentrate to the oil, run engine for 45 minutes, drain the oil, and fill with new, quality oil. Subsequent regular maintenace oil changes, add to existing oil, run engine for 45 minutes, drain the oil, and fill with new, quality oil. Detailed instruction sheet is included with the product.