Sierra 94407 25W-40 FCW Synthetic Blend I/O Engine Oil — 55 Gal Drum
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Bulk Synthetic-Blend 25W-40 Oil for Sterndrive and Inboard Engines
Sierra 94407 is a 25W-40 NMMA FC-W® Certified synthetic-blend 4-cycle engine oil engineered for the specific demands of sterndrive and inboard marine engines. Blended from premium synthetic and mineral base stocks with a purpose-built additive system, it delivers the protection these higher-displacement, higher-torque engines require — in a 55-gallon drum for commercial and high-volume service operations.
Key Benefits
- NMMA FC-W® Certified synthetic-blend formulation for sterndrive and inboard engines
- Superior corrosion protection against the marine environment
- Advanced anti-wear additives protect internal engine components under load
- Outstanding friction reduction for smoother operation and longer engine life
- Resists thermal breakdown under high RPM, extreme temperatures, and heavy loads
- Extensively tested for consistent performance in demanding marine applications
Also Available in Smaller Sizes
- Sierra 1894402 25W-40 FCW Synthetic Blend I/O Oil — 1 Qt
- Sierra 1894404 25W-40 FCW Synthetic Blend I/O Oil — 5 Qt
Parts Desk Insights
This drum is the right buy for marinas, dealerships, and mobile service operations that regularly service MerCruiser, Volvo Penta, Indmar, or other sterndrive and inboard engines. Best use case: any high-volume shop that goes through multiple gallons of 25W-40 per season and wants to reduce reorder frequency and per-unit cost. Note that this is a sterndrive/inboard-specific viscosity — not interchangeable with the 10W-30 outboard oils. Stocking both ensures you’re covered across the full range of customer engine 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.