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COS Blog

COS Blog

Information about Central Oil Supply and all of its divisions.

Finding the Marine Oil that is Right for You

Jennie McRae - Monday, June 15, 2015

2-cycle oils, gasoil, and bunker fuels, oh my!


There is always some confusion around the difference between conventional oils and marine oils, and which is appropriate for your marine vehicle.


First, let’s discuss the difference between 4-cycle engines and 2-cycle engines.


Most likely, you have worked with both types of engines. The engine that is in your car and other personal and/or heavy duty motor vehicles is going to be a 4-cycle engine, and 2-cycle engines are found in chainsaws, motorcycles, weed-wackers, and lawnmowers.


Both 2-cycle engines and 4-cycle engines are found in marine vehicles. 2-cycle engines are used for their lightweight and easy-to-repair nature. 4-cycle engines are used for their quiet, smooth, and trolling abilities.


2-cycle oils are meant to be mixed with the fuel in your 2-stroke engine. The fuel and oil mix, (usually ranges from 16:1 to 100:1), and they work together to keep your 2-cycle engine functioning properly because of how a 2-stroke engine runs.  


4-stroke engines, however, do not use an oil/gas mixture. Most people see this as an advantage to using a 4-stroke engine. Because of this, many people have the misconception that they can use conventional oil in their 4-stroke marine applications. Please note that 4-stroke marine oil is still necessary for its anti-corrosion properties.


The most important thing when choosing a marine oil is to know what application you are working with. At Central Oil & Supply we carry both 2-stroke and 4-stroke marine oils. It is essential to know what type of engine you have in your marine vehicle in order to choose the correct marine oil.


For more information on what type of marine oil best suits your summer activities, please call one of our Regional Sales Support Specialists at 1-800-883-8081.

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