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Add to CartMercury Premium Plus 2-Stroke Marine Engine Oil is specifically formulated to meet the needs of high-horsepower outboards in extreme marine operating conditions. It contains a higher concentration marine additive package and is blended with the highest quality ash-less dispersants. Mercury's Premium Plus oil far exceeds the Mercury in-house test standards, which are more stringent than the industry's TC-W3 standard.
Size: 3.78 L (1 US gal)
Benefits of Mercury Premium Plus Oil:
This oil meets all outboard and personal watercraft manufacturers' recommendations for use of TC-W2 and TC-W3 oils in pre-mix or oil-injected 2-cycle applications. Provides warranty protection for Mercury, Mariner, Force, and Sport Jet and M2 Jet Drive 2-cycle engines.
It varies model to model, check out our Mercury and MerCruiser oil capacity guides for more information and capacity charts!
| Ratio Gas : Oil | 1 Gallon | 3 Gallon | 6 Gallon | 10 Gallon |
| Ounces of Oil to Add | ||||
| 16 : 1 | 8 | 24 | 48 | 80 |
| 25 : 1 | 5 | 15 | 31 | 52 |
| 50 : 1 | 3 | 8 | 16 | 26 |
| 100 : 1 | 1.5 | 4 | 8 | 13 |
What is Mercury 858027K01 Premium Plus 2-Stroke Marine Oil used for?
Mercury 858027K01 Premium Plus 2-Stroke Marine Oil is formulated for high-horsepower outboards operating in demanding marine conditions. It is designed for pre-mix or oil-injected 2-cycle applications and provides wear and corrosion protection while helping maintain engine performance and fuel economy.
What type of 2-stroke engines can use Mercury Premium Plus Marine Oil?
Mercury Premium Plus Marine Oil meets manufacturer recommendations for TC-W2 and TC-W3 oils in pre-mix or oil-injected 2-cycle applications. It provides warranty protection for Mercury, Mariner, Force, Sport Jet, and M2 Jet Drive 2-cycle engines.
How does Mercury Premium Plus 2-Stroke Oil protect an outboard engine?
The oil contains a higher concentration marine additive package and ash-less dispersants. It provides wear and corrosion protection while helping reduce carbon buildup in the exhaust system and harmful deposits in the combustion chamber.
Does Mercury Premium Plus 2-Stroke Oil meet TC-W3 requirements?
Yes. Mercury Premium Plus 2-Stroke Marine Oil meets manufacturer recommendations for TC-W2 and TC-W3 oils in pre-mix or oil-injected 2-cycle applications. The product description also states that it exceeds Mercury's in-house test standards, which are more stringent than the industry's TC-W3 standard.
What size is Mercury 858027K01 Premium Plus 2-Stroke Marine Oil?
Mercury 858027K01 Premium Plus 2-Stroke Marine Oil is supplied in a 3.78-liter (1 U.S. gallon) container.
What fuel-to-oil mixing ratios are listed for Mercury Premium Plus Oil?
The product information lists 16:1, 25:1, 50:1, and 100:1 gas-to-oil ratios. For example, the chart lists 8 ounces of oil per gallon at 16:1, 5 ounces at 25:1, 3 ounces at 50:1, and 1.5 ounces at 100:1. Use the ratio specified for your particular application.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
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