Lucas Engine Oil Stop Leak is a unique formulation of Lucas additives and very specific base stocks designed to stop seal leaks in engines. It contains nothing that could be harmful to an engine and can actually extend the life of the engine oil at least 50% longer.
In Gasoline Engines:
A puff of white smoke out of the tail pipe in the morning is a sure sign of worn valve seals allowing oil to seep past the valves into the combustion chamber when the engine is not running. This is a sign of a high-mileage engine. Allow a few days for Lucas Engine Oil Stop leak to correct this problem. To keep this problem corrected a quart (or liter) will probably have to be added with each oil change.
For use in Gasoline and Diesel Engines.