The Purpose of Marine Engine Oil

While most all boat owners recognize that oil serves some purpose and must be changed now and then or pre-mixed into the gasoline, some don’t know what oil does inside the actual marine engine. The oil’s job is to stop all the metal surfaces in the engine from grinding together and becoming damaged from friction. Most people recognize that oil serves as a lubricant, but oil also needs to hold in suspension the byproducts of combustion like silica and acid. Oil cleans the engine of these chemicals, because otherwise build-ups would occur and wear down the engine at a remarkable pace.

Oil needs to lubricate and clean the engine under tremendous conditions of heat and pressure. Several engine oils, like outboard motor oil, contain special additives that help the engine work better under specific conditions. For example, outboard motor oil contains an additive to reduce condensation in the engine. For this reason, it’s important to use premium outboard motor oil in outboard engines.