Sierra Part # 18-9530-3 Premium Synthetic Blend Engine Oil, 1 Gallon Sierra TC-W3 2-Cycle

Sierra Premium Blend TC-W3 2-Stroke Outboard Oil – 1 Gallon Jug (Part # 18-9500-3)

The #1 aftermarket 2-stroke oil trusted by marine mechanics for over 50 years. Sierra Premium Blend (advanced synthetic-blend formula) is engineered to surpass the demands of today's high-horsepower outboards while standing up to the harshest saltwater environments.

NMMA® TC-W3® certified and warranty-safe for all 2-cycle marine engines, including Mercury, Yamaha, Evinrude/Johnson, Suzuki, Honda, Tohatsu, and more. Perfect for oil-injection systems or pre-mix applications — will NOT void your engine manufacturer's warranty.

Key features & benefits: • High-performance synthetic-blend lubricant exceeds JASO, ISO, API, and NMMA standards for modern 2-cycle engines • Dramatically reduces ring sticking, deposit buildup, and exhaust port blockage for easier starting and cleaner running • Significantly lower aquatic toxicity to fish and marine life compared to traditional outboard oils • Formulated for superior performance with lower-quality or ethanol-blended fuels • Minimizes smoke, keeps spark plugs cleaner, and extends overall engine life • Ideal for high-RPM, high-load conditions in today's powerful outboards, jetskis, and PWCs

One full gallon (128 fl oz / 3.78 L) jug — the same OEM-quality protection as dealer-branded oils (like Quicksilver Premium Plus or Yamalube 2M) at a fraction of the cost.

Sierra Marine has been the leading supplier of marine engine and drive parts for over 50 years, offering thousands of premium parts that meet or exceed original equipment standards.

Stock up on the oil that keeps your 2-stroke running stronger, cleaner, and longer — season after season.