Sierra 96802 Full Synthetic Lower Unit Gear Lube, 1 Quart
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Sierra 96802 Full Synthetic Lower Unit Gear Lube – 1 Quart
Protect your lower unit with the best available gear lubrication. Sierra 96802 is a full synthetic gear lubricant engineered to maximize gear life and deliver superior wear protection in outboard and sterndrive lower units — particularly in high-load, high-RPM, and temperature-extreme operating conditions where conventional or synthetic-blend oils fall short.
At 1 quart (946 mL), this is the right size for a single lower unit service on most outboards, or for topping up between full changes on larger engines.
Key Features
- Full synthetic formulation — superior wear protection and film strength versus conventional or synthetic-blend gear lubes
- Shear stable — maintains viscosity under high mechanical stress throughout the full service interval
- Oxidation resistant — resists breakdown at high operating temperatures for longer service life between changes
- Wide temperature performance — flows readily in cold conditions for reliable cold-start protection, and holds viscosity under heat
- Friction reduction — reduces heat and wear in the lower unit gear set for improved efficiency and longevity
- API GL-5 / MIL-L-2105E rated — meets the most demanding gear lube service classifications
Specifications
- Base stock: Full synthetic
- API service: GL-5
- Military spec: MIL-L-2105E
- Volume: 1 US quart (946 mL)
- Part number: 96802 | SKU: 47-96802
Best Use Case
The 96802 quart is the ideal choice for performance outboard and sterndrive owners doing their own lower unit service and wanting the best available synthetic protection — without the volume commitment of a pail. It’s especially well-suited for high-HP outboards, cold-climate operation, and engines where extended drain intervals are desired.
For shops or operators servicing multiple engines, the Sierra 96805 Full Synthetic Gear Lube, 5-Gallon Pail offers significantly better cost-per-service value. For a high-performance conventional option at a lower price point, see the Sierra 96502QP Hi-Performance Gear Lube & Pump Kit, 1 Quart or the Sierra 96502 Hi-Performance Gear Lube, 1 Quart. For the highest-volume bulk option in the Sierra gear lube range, see the Sierra 96507 Hi-Performance Gear Lube, 55-Gallon Drum.
Parts Desk Insights
Best use case is the performance-minded recreational boater with a high-HP outboard or sterndrive who wants full synthetic protection for a single lower unit service. The 96802 is the premium quart option in the Sierra gear lube lineup — lead with the shear stability and extended service life benefits when justifying the price premium over the conventional 96502. Key upsell: customers buying the 96802 regularly for multiple engines should be directed to the 96805 5-gallon pail for better value. For customers who are price-sensitive or don’t require full synthetic, the Sierra 96502 Hi-Performance Gear Lube is the right redirect. Always confirm lower unit capacity and OEM gear lube specification before recommending.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.