Lucas stop leak actually works. Now you can't expect it to work on a mechanical failure like rotted oil pan and broken gasket but it will stop or slow down seals and gaskets that are drying out or starting to fail.
Does Lucas Oil Stop leak swell seals?
Many older, high mileage cars still perform well, but may develop an annoying oil leak. ... Most of these leaks can be stopped with the use of Lucas Engine Oil Stop Leak which conditions, swells and softens seals, gaskets and O-ringsO-ringsAn O-ring, also known as a packing or a toric joint, is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a round cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, forming a seal at the interface.https://en.wikipedia.org › wiki › O-ringO-ring - Wikipedia. The use of this product will not dilute the additives in your motor oil.
How long does Lucas stop leak last?
So how long can you expect them to last? It depends. If the leak is mild to moderate, we've had customers run 10,000-50,000 miles with no further issues.May 1, 2018