4Pk Gallon Hydraulic Oil and Stop Leak Fits Lucas Oil 10018Pack of Four (4) New (1 Gallon) Hydraulic Oil Booster & Stop Leak Adds life to pumps, rams and seals Adds lubricity and thermal stability to any hydraulic oil Automatic transmissions: use approx. 10% to stop slip, leaks, rough shifting and over heating; up to 30% in worn units Construction equipment: use approx. 5% 10% for preventative maintenance; up to 20% to correct heat, leaks and fading in older equipment Hydrostatic drives: use approx. 10% for