Designed for proper break in on any two-stroke engine. Recreational or race, proper break-in determines both the lifespan and performance potential of an engine. Dumonde Tech Break-in is a very complex formula that allows proper ring seat, work hardening and impregnates parts with a matrix compound film to protect surfaces against lean periods and corrosion. Through research, it has been found that a high percentage of these processes are not achieved with conventional oils. Many castor-based oils have ring-seating problems during the break-in period. By not achieving proper ring seal, performance and durability can be greatly affected. Available in pints and gallons.