80W-90 Premium Blend Gear Lube, 32 oz. | Sierra 18-9600-2

One quart fills the average 40-150 hp outboard lower unit with a little left over.

Why 10,000+ boaters keep a spare bottle on the dock

• GL-5 rated – the exact spec Mercury, Yamaha, and OMC call for
• Amber color lets you spot water contamination instantly
• Reduces friction so gears shift smoother and run 10–15 °F cooler
• Works in salt or fresh water – no seasonal swap needed
• Meets or beats every OEM warranty requirement

Direct OEM Replacements

Full Specs

• Sierra Premium Blend Marine Gear Lube
• 1 quart (946 ml) squeeze bottle
• SAE 80W-90
• API GL-5
• Amber color
• Recommended pump: Sierra 18-9781 (sold separately)

60-Second Lower-Unit Oil Change

1. Tilt motor down, remove bottom drain screw.
2. Pump fresh lube in until it drips from the top vent.
3. Install vent screw FIRST, then drain screw.
4. Wipe, recycle old oil, done.

Free pump adapter with every 3 quarts

FAQs

Can I mix this with my old oil? Yes—both are GL-5 mineral based. Just change it all next season.

High-performance or electric-shift lower unit? Use Sierra Hi-Performance Synthetic 18-9650-2 instead.