Motul Break-In Engine Oil 10W-40 is a high-performance mineral break-in oil specially formulated for running-in 4-stroke engines in both automotive and powersports applications, whether for a fresh rebuild or racing use. Its high ZDDP fortified formula helps promote fast, safe mating of piston rings and cylinder liners while providing added protection for high-lift camshafts, flat tappets, and rockers. With balanced friction modifiers, a shear-stable viscosity index modifier, and balanced detergent/dispersant levels, it is designed to support efficient break-in while maintaining a strong lubricating film and helping control deposits. It also carries JASO MA2 and API SJ/SH/CF standards, and Motul states it is compatible with wet clutches and integrated gearboxes. This package size is 1 Liter (1.05 U.S. Qt).

Why buyers love it:

• High ZDDP formula for added anti-wear protection during engine break-in

• Helps support fast ring seating and proper cylinder liner mating

• Protects high-lift cams, flat tappets, and rockers

• Balanced friction modifiers help enhance break-in efficiency

• JASO MA2 and API SJ/SH/CF rated

• Compatible with wet clutches and integrated gearboxes

• Ideal for rebuilt, freshly built, and racing 4-stroke engines in automotive and powersports use

How to use:
Use during the initial break-in period for a newly built or rebuilt 4-stroke engine. Follow your component manufacturer’s break-in instructions, typically operating the engine under variable load and RPM while avoiding excessive idling to help prevent glazing. Change the oil according to the recommended running interval based on engine type and component materials. This oil can also be mixed with synthetic or mineral lubricants if needed.

Important notes: This is a 10W-40 mineral break-in oil sold under Motul part number 108080 in 1 Liter (1.05 U.S. Qt) packaging.