Sierra Hi-Performance Gear Lube – 1 Qt
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You have 30 days to request a return. All sale items are final sale.
Sierra Hi-Performance Gear Lube – 1 Qt
Protect your lower unit with a gear lube engineered to go beyond what standard OEM lubricants offer. Sierra's Hi-Performance Gear Lube uses a synthetic-blend formulation designed for the high-load, high-pressure environment inside outboard and sterndrive (I/O) lower units — where heat, water exposure, and mechanical stress are constant.
Whether you're running a high-performance outboard or a workhorse sterndrive, this gear lube is built to keep gears, bearings, and gear case components protected through long seasons and demanding conditions.
Key Benefits
- Formulated for high-performance and high-load outboard and I/O lower unit applications
- Reduces operating friction for increased performance and component protection
- Protects gears, bearings, and gear case components against wear
- Exceeds OEM hi-performance gear lubricant specifications
- Synthetic-blend formula resists water contamination and thermal breakdown
Specifications
- Type: Hi-Performance Synthetic Blend
- Volume: 1 Quart
- Application: Outboard & Sterndrive (I/O) Lower Units
Related Products
- Sierra Hi-Performance Gear Lube & Pump Kit – 1 Qt (includes pump & adapters)
- Sierra Hi-Performance Gear Lube – 5 Gal Pail
- Sierra Premium Gear Lube – 1 Qt
- Sierra Premium Gear Lube – 10 oz
- Sierra Gear Lube Pump
Parts Desk Insights
This is the straight quart of Hi-Performance Gear Lube — the right choice if you already have a pump and adapters on hand, or if you're topping up rather than doing a full change. If you're doing a complete lower unit service and need the pump and adapters too, the Hi-Performance Gear Lube & Pump Kit is the better value. Hi-Performance formula is the right call for performance outboards, high-hour motors, or any application where the OEM specifically calls for hi-performance gear lube — check your engine manual if you're unsure whether standard or hi-performance is specified. For bulk servicing or multi-engine boats, the 5-gallon pail is worth considering.
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.