Mercury Marine introduces new lineup of four-stroke marine engine oils

FOND DU LAC, Wis. – Mercury Marine’s recently introduced lineup of four-stroke marine oils is the new top choice for protection on the water. The new simplified lineup replaces Mercury’s previous four-stroke oil family.

The use of a quality engine oil is critical to maintaining engine performance and reliability. The new lineup of oil from Mercury sets the new standard in wear protection, shear stability and corrosion defense. Mercury four-stroke oils exceed NMMA FC-W requirements, surpassing other marine engine oils on the market.

Mercury’s 25W-40 Synthetic Blend headlines the new Mercury four-stroke lineup. After five years of engineering and development by the largest marine engine manufacturer in the world, this premium oil is approved for use in all four-stroke marine engines, including the Mercury Verado family of outboards, MerCruiser sterndrives and all other Mercury and competitive four-stroke marine engines.

Mercury 25W-40 Synthetic Blend is made with high-quality base oils without viscosity modifiers, so it is highly-resistant to shear and breakdown. In high-load testing it retained 99.4 percent of its viscosity (oil strength), significantly better than other marine oils tested.* (ASTM D-6278; ASTM D-445) In high-temperature shear stability testing the oil proved to be 40 percent stronger than the next best marine oil, 56 percent stronger than automotive oil and 34 percent stronger than NMMA FC-W minimum requirements. (Kurt-Orbahn Shear Stability Test ASTM D-6278)

All Mercury four-stroke marine oils feature Mercury’s new Flagship Protection additive package, which has been thoroughly tested and proven to offer 33 percent better camshaft wear protection (ASTM D-6891 Test Sequence IV cam wear limits). Finally, Mercury developed an exclusive corrosion protection package with twice the surface corrosion protection compared to other marine oils and passenger car motor oil.

 “Whether it’s one of our Mercury engines or any other marine engine in which our oil is used, we want our customers to have the best experience possible,” said Eric Reilley, product manager, Mercury Oils and Lubricants. “That’s why when we set out to develop new four-stroke oil we made sure it would be hands-down the best oil you can put in your Mercury Marine engine.”

Mercury 4-stroke oil features:

  • Best-in-industry wear and corrosion protection
  • Maintains peak engine reliability and performance
  • Flagship Protection is best available in the marine industry
  • 25W40 blends contain no viscosity modifiers
  • Premium oil, value price

Synthetic Blend 25W40 exclusive features:

  • Best-in-industry wear and corrosion protection
  • Enhanced shear protection for high-temperature, max output engines
  • Top four-stroke marine oil

25W40 Mineral Exclusive Features

  • Best-in-industry wear and corrosion protection
  • Enhanced shear protection for high-temperature, max output engines
  • Value alternative to Synthetic Blend 25W40

10W30 Mineral Exclusive Features

  • Blended from high-quality base stocks
  • Exceptional wear and corrosion protection
  • Optimized for cold weather and manual start applications

*Aftermarket 10W30 marine formulas and automotive oils that are commonly misused in marine engines.


  1. Quite impressive engine oil.

  2. Those are some impressive oils, hopefully I can get some from West Coast Offshore now that I know about them!

Leave a Reply

Your email address will not be published. Required fields are marked *