How long will Microlon extend the engine life?

We cannot state that definitely. Oil analysis reports consistently show wear at an average of 75% to 100% greater in an untreated engine. We can quote from the Aviation Consumer (June 1, 1978 issue) which reported on tests conducted by Caterpillar. These tests showed an estimated increase of expected engine life of between 20% and 40%. Since Microlon is a one-time treatment, the Microlon film will last the life of the engine, however long that may be.