Marine engines are under 100% load 90% of the time because they are required to push so hard against the resistance of water. Compare this to car engines, which are typically at 100% load only 10% of the time. Therefore marine engines are under far more stress and far more subject to wear. This makes it very important to treat with Microlon if you want to maximize engine life. Because marine engines work so hard, they also consume much more fuel. Significant fuel consumption savings of up to10% are typically reported after the Microlon treatment. The Microlon film also protects against harmful corrosion, rust and scale so commonly experienced in the marine environment. Every marine engine needs a one time Microlon treatment.