Star Brite High-Vis 80W90 Lower Unit Gear Lube, 32 oz – 27032
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Star Brite High-Vis 80W90 Lower Unit Gear Lube – 32 oz | Part #27032
Keep your lower unit running smoothly with Star Brite High-Vis 80W90 — a conventional gear lubricant formulated specifically for outboard motors and sterndrives. The bright, high-visibility colour makes it easy to spot leaks or contamination during and after a service, giving you a quick visual check on lower unit health every time you change the oil.
At 32 oz (1 quart), this size is ideal for a single full lower unit service on most outboards, with a little left over for a top-up.
Key Features
- High-visibility formula — bright colour makes it easy to detect leaks or water contamination at a glance
- SAE 80W90 viscosity — correct weight for most outboard and sterndrive lower units
- Anti-wear additives — protects gears and bearings under load
- Rust and corrosion inhibitors — guards internal components against moisture and salt exposure
- Will not void manufacturers’ warranties — meets API MT-1, GL-5, and MIL-L-2105D service requirements
- Compatible with all outboard motors and sterndrives — a versatile choice across most engine brands
Specifications
- Viscosity: SAE 80W90
- API service: GL-5, MT-1
- Meets: MIL-L-2105D
- Size: 32 oz (946 mL)
- Part number: 27032
Best Use Case
The 32 oz size is the right choice for a single lower unit service on most mid-size outboards — enough for a complete drain-and-fill with a small reserve. It’s a practical option for recreational boaters who service their own engine once or twice a season and want the leak-detection advantage of the high-vis formula.
For smaller top-up jobs or engines with very small lower unit capacity, see the Star Brite High-Vis 80W90 Gear Lube, 10 oz (27010). For shops or multi-boat owners buying in volume, the Star Brite Synthetic Blend 80W90 Gear Lube, 1 Gallon (27200) offers a better cost-per-service value with upgraded synthetic blend protection.
To dispense cleanly, pair with the Star Brite 28402 Adapter Fitting (MerCruiser, OMC, Evinrude, Volvo & more) or the Star Brite 28401 Adapter Fitting (Yamaha, Nissan, Tohatsu & Honda).
Parts Desk Insights
Best use case is the recreational single-engine boater doing a seasonal lower unit service. The high-vis formula is a genuine selling point — it’s easy to explain to customers: if the oil coming out is milky or discoloured, there’s water in the lower unit. Position the 32 oz as the “right size for one job” and upsell the 1-gallon synthetic blend (27200) for customers with multiple engines or higher-HP applications. Always recommend pairing with the appropriate adapter fitting (28401 or 28402) based on engine brand. Prompt customers to confirm GL-5 approval in their owner’s manual — a small number of manufacturers specify proprietary formulations.
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.