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Compatible with petroleum, semi-synthetic and full synthetic motor oils
Contains no harmful solvents
Can extend engine oil life by 50% or more
Lucas Engine Oil Stop Leak is an all-new formulation of Lucas additives and very specific base stocks designed to stop seal leaks in engines! It reduces engine noise and oil consumption, while raising oil pressure and renews worn seals with no risk of damage or eventual corrosion. It is not limited to engines – effective at stopping leaks in automatic transmissions, hydrostat transmissions or hydraulic systems