Bilge heat and moisture
Engine compartments are hot and humid; check for corrosion.
Winterize carefully
Drain or protect raw-water cooling in freezing climates per the maker.
MARINE EQUIPMENT
Sterndrive and inboard engine fluids and lubricants.
Marine engine oil, sterndrive gear lube, and grease for sterndrive and inboard gas and diesel engines.
Questions: [email protected] · Every AMSOIL link on this page carries dealer #30734402.
Fluids by compartment.
Confirm the fluid type, grade, and specifications in the sterndrive and inboard engine maker’s manual before ordering. These examples are not a fitment result for a specific machine.
Engine
Gas and diesel inboards list a marine oil specification.
Marine engine oil
10W-40 Marine Engine Oil
10W-40 Marine Engine Oil for compatible marine engines.
Product details Shop at AMSOIL ↗
Marine engine oil
25W-40 Synthetic-Blend Marine Engine Oil
25W-40 Synthetic-Blend Marine Engine Oil for compatible marine engines.
Product details Shop at AMSOIL ↗
Diesel oil
15W-40 Heavy-Duty Diesel and Marine Oil
15W-40 Heavy-Duty Diesel and Marine Oil for compatible diesel engines.
Product details Shop at AMSOIL ↗Sterndrive and transmission
Drives and marine transmissions use their maker’s specified lubricant.
Gear oil
75W-90 Marine Gear Lube
75W-90 Marine Gear Lube for compatible differentials and gear assemblies.
Product details Shop at AMSOIL ↗
Transmission fluid
Signature Series Multi-Vehicle Automatic Transmission Fluid
Signature Series Multi-Vehicle Automatic Transmission Fluid for compatible automatic transmissions. Verify the transmission-specific application list.
Product details Shop at AMSOIL ↗Grease and corrosion
Gimbal bearings and steering need grease; protect against salt.
Grease & assembly lube
Synthetic Water-Resistant Grease
A synthetic grease for compatible components exposed to water, including boat trailers and powersports equipment.
Product details Shop at AMSOIL ↗
Cleaners & protectants
Heavy-Duty Metal Protector
A heavy-duty metal protectant for compatible surfaces needing a persistent protective coating.
Product details Shop at AMSOIL ↗ORDER THROUGH INDEPENDENT AMSOIL DEALER #30734402
Ready to order, or have a question first?
Shop AMSOIL directly with Jeff’s dealer number already attached, or open a business account. AMSOIL handles pricing, checkout, and shipping. If you contact AMSOIL another way, give them dealer number 30734402.
Prefer to talk it through? Email Jeff at [email protected] with your equipment, the fluid now in use, and your approximate volume.
Frequently asked questions
What oil goes in an inboard boat engine?
The marine oil the engine maker specifies.
What lube goes in a sterndrive?
The gear lube the drive maker specifies.
General maintenance information. Always follow the equipment maker’s requirements and the current product data. Product availability, pricing, and account terms are set by AMSOIL.
Industries that use this equipment
More marine equipment
Open a commercial account with dealer #30734402
https://www.amsoil.com/business-opportunities/get-a-commercial-account/?zo=30734402
Jeff Pittman · A1 Synthetic Oil · Independent AMSOIL Dealer #30734402 · Newport, Washington · [email protected]