With a higher number of performance-boosting additives than automotive oil, this synthetic blend meets and exceeds the needs of high-performance outboards. It's special formula protects outboards from friction damage and engine wear.
The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.
Reviewed by 1 customer
Displaying review 1
Comments about West Marine Premium 4-Stroke Oil, 10W30, Gal.:
This oil made my Yamaha f115 outboard run very smooth and is fcw nmma certified which is what Yamaha requires in there engines I have noticed a big difference at idle and overall performance through the rpm range and seems to keep engine running clean this is my new oil from now on but I do recommend still using a Yamaha oil filter this oil is a great value for the money and in my opinion is better then yamalube the west marine 10w30 premium outboard synthetic blend is a really good quality marine oil.