Sierra 95402 Fully Synthetic TC-W3 2-Stroke Marine Engine Oil – 1 Qt.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Sierra 95402 Fully Synthetic TC-W3 2-Stroke Marine Engine Oil – 1 Qt.
A 1-quart bottle of Sierra’s fully synthetic TC-W3 2-stroke outboard oil, engineered for high-performance and high-horsepower applications. The 95402 exceeds the requirements of NMMA TC-W3, JASO, ISO, and API standards, making it compatible with virtually all 2-stroke outboard engines — including modern direct-injection systems. The fully synthetic base provides cleaner combustion, reduced carbon deposits, and superior protection compared to conventional or semi-synthetic alternatives.
Suitable for both oil injection systems and pre-mix applications, this oil is formulated to minimize ring sticking, exhaust port blockage, and deposit buildup — common failure points in high-output 2-stroke engines. The reduced aquatic toxicity profile makes it a responsible choice for use in sensitive freshwater and coastal environments.
Specifications
- Part Number: 95402
- Type: Fully synthetic
- Rating: TC-W3 / JASO / ISO / API
- Engine type: 2-stroke outboard
- Application: Oil injection systems and pre-mix
- Volume: 1 US quart (~946 mL)
- Weight: 0.9 kg (2.0 lb)
Parts Desk Insights
Best use case: The quart is the right size for topping up an oil injection reservoir, carrying a spare on board for longer passages, or running a pre-mix engine that doesn’t consume a full gallon per season. It’s also a practical way to try the fully synthetic formulation before committing to a larger quantity. For boaters who go through oil regularly — particularly those running high-horsepower direct-injection outboards like E-TEC or FICHT — the Sierra 95403 Fully Synthetic TC-W3 2-Stroke Oil – 1 Gal. offers better value per litre. Always verify your engine manufacturer’s oil specification before switching oil types.
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.