Description

Mercury 8M0149203 is a genuine Mercury Marine SAE 10W-30 synthetic blend 4-stroke marine engine oil. Retail and dealer listings identify this part number as a 1 quart bottle, intended for marine 4-stroke applications where 10W-30 is specified.

Key Features
This oil is a 10W-30 synthetic blend formulated for marine use, with corrosion protection, shear strength, and viscosity retention designed for high-rpm, high-load operation. Mercury says it is engineered for 4-stroke marine engines and exceeds marine engine manufacturer warranty requirements and recommendations.

Engine Compatibility
Mercury’s current 10W-30 synthetic blend guidance covers all 4-stroke outboards up to 150 HP, plus 3.4L V6 and 4.6L V8 outboards where 10W-30 is called for. Always confirm the required oil grade in the owner’s or service manual for the exact engine model and serial number.

Serial Number Fitment Notice
Please confirm the correct oil specification using your exact Mercury or MerCruiser model and serial number before purchase. Mercury’s official Parts Catalog is the safest way to verify application details.

When This Part Needs Replacement
Use this oil during routine oil changes on applicable 4-stroke marine engines. Fresh marine-grade oil is important for wear protection, corrosion resistance, and keeping the engine protected during both operation and storage. This usage is supported by Mercury’s product guidance for 10W-30 marine oil.

Installation Notes
Use only the oil viscosity specified for the engine. This product is intended for marine 4-stroke use, and Mercury advises checking the owner’s manual or service manual for the correct application and service instructions.

Alternate / Superseded Part Numbers
No confirmed superseded part number was established from the sources reviewed. The exact catalog number consistently shown is 8M0149203.

Parts Desk Insight
Marine engine oil is not just about viscosity. The corrosion inhibitors and load-handling additives matter, especially on engines that spend time in humid, salty, or seasonal storage conditions. Matching the exact Mercury-recommended oil grade is one of the easiest ways to protect long-term engine life.

Shipping: Ships same or next day for fast Canada wide shipping.