Mercury Premium Plus TC-W3 2-Stroke Oil 32 oz 858026KC1
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Mercury 858026KC1 is a genuine OEM Premium Plus TC-W3 2-stroke marine engine oil in a 32 oz / 1 quart / 1 liter package. Mercury's current product information describes Premium Plus as an advanced synthetic blend formulated for hard-working 2-stroke marine engines, with strong wear and corrosion protection and reduced carbon build-up under high-speed, heavy-load operation.
Key Features
- Genuine Mercury OEM part number 858026KC1.
- Premium Plus TC-W3 synthetic blend 2-stroke marine engine oil.
- Package size is 32 oz / 1 quart / 1 liter.
- Designed for oil-injected, carbureted, or EFI mid- to high-horsepower 2-stroke outboards.
- Helps provide wear and corrosion protection while minimizing performance-robbing carbon deposits.
- Meets manufacturer recommendations for use of NMMA TC-W3 oil in premix or oil-injected 2-stroke applications.
Engine Compatibility
The strongest supportable application for 858026KC1 is mid- to high-horsepower 2-stroke outboards that call for TC-W3 oil, including oil-injected, carbureted, and EFI systems. This is an oil-specification product, so the key compatibility check is the engine's required lubricant standard rather than a narrow engine serial range.
Serial Number Fitment Notice
Match this product by the engine oil requirement in the owner's manual or service manual rather than by serial number alone. The important check is whether the engine specifies NMMA TC-W3 2-stroke oil and whether Premium Plus is the correct grade for the engine's horsepower range and operating conditions.
When This Part Needs Replacement
This oil is used during normal 2-stroke oil reservoir refill or premix service on compatible engines. It is the right product when the engine requires a TC-W3 oil and the owner wants the higher protection level Mercury describes for harder-running mid- to high-horsepower 2-stroke use.
Installation Notes
Use 858026KC1 only in engines that call for TC-W3 2-stroke oil. It is suitable for oil injection systems or premix use where that oil specification is required, and it should not be substituted for a different oil category that the engine manual specifically requires.
Alternate/Superseded Part Numbers
Current sources reviewed clearly support 858026KC1 as the 32 oz / 1 quart / 1 liter Mercury package reference. Related Premium Plus family packaging appears under other Mercury and Quicksilver size-specific part numbers, but the exact requested SKU is 858026KC1.
Parts Desk Insight
With 2-stroke oil, the most important match is the oil specification and engine type, not just the bottle size. Checking that the engine specifically calls for TC-W3 before ordering is the simplest way to avoid buying the wrong lubricant.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
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
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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.
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Item must be in new, unused condition
Product must be in its original packaging
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