Mercury — 10W-30 4-Stroke Synthetic Blend Marine Engine Oil, 1 Gallon — 8M0149213
In stock items ship same or next day.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Mercury 10W-30 4-Stroke Synthetic Blend Marine Engine Oil, 1 Gallon – 8M0149213
Give your FourStroke outboard the protection it was built around. This genuine Mercury 10W-30 synthetic blend oil is formulated for the heat, high RPM and constant moisture of marine duty, holding its viscosity under sustained load and fighting corrosion from salt and humidity between outings. The 1-gallon jug covers a typical oil change on most mid- and high-horsepower FourStrokes.
Compatible Applications
- Mercury FourStroke outboards where SAE 10W-30 4-stroke marine oil is specified
- Mercury Verado and V6 and V8 FourStroke outboards where 10W-30 is listed as an approved grade for your operating climate
Always confirm the correct viscosity grade and oil capacity in your engine's owner's manual.
Part Details
- OEM part number: 8M0149213
- Brand: Mercury
- Product type: 4-Stroke Marine Engine Oil
- Grade: SAE 10W-30 synthetic blend
- Size: 1 US gallon (3.785 L)
- Certification: NMMA FC-W
- Condition: New, genuine OEM
Key Features
- Synthetic blend base for reliable protection across a wide temperature range
- Holds viscosity during extended high-RPM running
- Corrosion inhibitors help protect internal parts in salt and fresh water
- Formulated specifically for marine 4-stroke engines
Service Interval
Change the oil and filter at the interval in your engine's maintenance schedule, commonly every 100 hours or annually, whichever comes first. Check your owner's manual for the exact interval and capacity for your model.
Technical FAQ
Can I use automotive 10W-30 instead?
Automotive oils are not formulated for the corrosion protection and sustained load a marine engine sees. Use a marine FC-W rated oil where your manual calls for it.
Is this for MerCruiser sterndrives?
This oil is aimed at Mercury FourStroke outboards. MerCruiser inboard and sterndrive engines have their own oil specifications, so check your MerCruiser manual first.
How much do I need?
Oil capacity varies widely by model. Check your owner's manual and order enough to cover the full fill.
Also Available
- Mercury 10W-30 Synthetic Blend 4-Stroke Oil, 1 Quart – 8M0149203
- Mercury Quicksilver 10W-30 Synthetic Blend Oil, 1 Quart – 8M0142135
- Mercury Quicksilver 10W-30 Oil Change Kit, 150 HP FourStroke – 8M0188357
Parts Desk Insights
Best use: Routine 100-hour or annual oil changes on Mercury FourStroke outboards that call for 10W-30.
Most common mistake: Ordering this for a MerCruiser sterndrive or a 2-stroke outboard. It is a 4-stroke outboard oil, so match it to the engine type first.
Sizing and volume: One gallon is 3.785 L. If you are servicing a larger V6, V8 or Verado, check the capacity in your manual, since some need more than one gallon plus top-up.
Viscosity check: If you are unsure between 10W-30 and 25W-40, your owner's manual lists the recommended grade by operating temperature.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.