25W-40 4 Stroke Marine Stern Drive Engine Oil, 55 Gal.
Mouse Over to Zoom
Click to Enlarge

SIERRA25W-40 4 Stroke Marine Stern Drive Engine Oil, 55 Gal.


Fulfilled from vendor
Model # 10496578 | Mfg # 18-9400-7UPC # 808282111489


25W-40 4 Stroke Marine Stern Drive Engine Oil, 55 Gal.

Name Value
Capacity 55 Gallons
Compatibility Sterndrives
Service Category FC-W
Type Conventional
Viscosity 25W40

Product Overview

Engine oil formulated specifically for inboard marine engines.

Marine engines operate in a completely different environment from your car's engine; marine engine experience higher loads and are stressed more than automotive engines. For this reason Sierra formulated this mineral based oil to provide corrosion protection and excellent lubrication. A blend of additives provides high detergency, anti-wear and anti-oxidants to reduce deposits, wear and tear on internal engine components and ring sticking. Sierra engineered this oil to meet or exceed the required specifications for MerCruiser, OMC and Volvo Penta specifications to stay compliant with their manufacturer’s warranties. Have the confidence your marine engine has the protection it needs by using Sierra oil.

Key Features

  • Formulated specifically for marine inboard and sterndrive engines
  • Mineral based oil
  • Provides corrosion protection
  • Reduces wear on internal engine parts
  • Reduces piston ring deposits
  • Meets specification requirements of MerCruiser, OMC and Volvo Penta
  • API SJ, CF-4, CH-4 certified


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.

Related West Advisor Articles


Product Q & A