Mercury 858026K01 Premium Plus 2-Stroke Marine Oil - MW
Mercury 858026K01 Premium Plus 2-Stroke Marine Oil
Mercury's Premium Plus 2-Stroke Marine Engine Oil is formulated for today's high-horsepower outboards. This oil has a higher concentration marine additive package that meets the needs of high-horsepower outboards including direct fuel-injected engines in extreme marine operating conditions. Premium Plus far exceeds Mercury's in-house test standards, which are more stringent than the industry's TC-W3 standard.
Premium Plus has a clean burn, reducing carbon build-up in the exhaust system. This oil also provides superior lubrication. It 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.
Features:
- Formulated for high horsepower outboards
- Provides outstanding wear and corrosion protection
- Reduces carbon build-up in exhaust system
- Reduces harmful deposits in combustion chamber
- Helps maintain peak engine performance and fuel economy
- Blended with highest quality ashless dispersants
Provides warranty protection for Mercury, Mariner, Force, and Sport Jet and M2 Jet Drive 2-Cycle engines.
How much oil does my engine need?
It varies model to model, check out our Mercury and MerCruiser oil capacity guides for more information and capacity charts!
Mercury Premium Plus Fuel Mixing Chart
| Gas : Oil Ratio | 1 Gal Gas | 3 Gal Gas | 6 Gal Gas | 10 Gal Gas |
| Ounces of Oil to Add | ||||
| 25:1 | 5 | 15 | 31 | 52 |
| 50:1 | 3 | 8 | 16 | 26 |
| 100:1 | 1.5 | 4 | 8 | 13 |
WARNING: Cancer and Reproductive Harm - P65Warnings.ca.gov

