NMMA Four-Stroke Certifications FC-W stands for Four-Stroke Cycle, Water Cooled Gasoline Engine Lubricant. NMMA certification indicates an oil has been tested by a certified laboratory and NMMA has issued a license for that oil’s formulation and it registers the approved brands that have been tested.

What is FC-W oil rating?

FC-W oil is mother’s milk for four-stroke outboards, but it is also recommended for use in four-stroke personal watercraft and gasoline inboards and sterndrives. Of course, because this is premium oil, it has a premium price.

Is FC-W oil synthetic?

Ultra1Plus™ SAE 25W-40 Synthetic Blend Marine Engine Oil FC-W is a premium 4-Stroke outboard engine oil formulated with synthetic and conventional base oils as well as a premium performance…

What is NMMA oil?

To help boaters recognize lubricants that will give the engine life designed-in by marine engine manufacturers, the National Marine Manufacturers Association (NMMA) has developed a program for the certification of these premium quality lubricants.

What Mercury oil is Catalyst friendly?

This full Synthetic 20W-40 engine oil was formulated to provide optimum operation and longer life for all Mercury MerCruiser petrol engines and for the critical engine catalyst systems offered today.

What is catalyst compatible oil?

APPLICATION. • Sierra NMMA FC-W Catalyst Compatible Motor Oils are high performance engine oils for four-stroke recreational vehicles requiring the National Marine Manufacturers Association’s (NMMA) FC-W and FC-W Catalyst Compatible specification.

How is a 4 stroke engine lubricated?

Four-stroke engines are lubricated by oil held in an oil sump. The oil is distributed through the engine by splash lubrication or a pressurized lubrication pump system; these systems may be used alone or together. Splash lubrication is achieved by partly submerging the crankshaft in the oil sump.

Should you use 2 cycle synthetic oil?

In short, any 2-stroke motor is a suitable place to use synthetic oil specially formulated for 2-stroke engines. Particularly where motors that have seasonal use are concerned, high-quality synthetic 2-stroke oil can be useful as among the additives you’ll often find fuel stabilizer.

Can I use any 2-stroke oil in my outboard?

Two-stroke outboards require oil that meets the TC-W standard, which indicates a marine oil designed for a two-stroke engine. Again, consult the owner’s manual for specific two-stroke oil requirements.

Which mercury oil is considered Catalyst friendly and is approved for MerCruiser emissions controlled engines?

What is Max RPM on a MerCruiser 350 MAG MPI?

Mercruiser WOT RPM Range Chart*