Sierra Direct Injection TC-W3 Oil 1 Gallon is a high-performance 2-cycle marine engine oil formulated for direct injection outboards and other demanding two-stroke applications. Designed for todays high-horsepower marine engines, this Sierra oil helps protect against heat, friction, rust, and harmful deposits while supporting reliable operation on the water. The 1-gallon jug is ideal for routine maintenance, seasonal service, and keeping your outboard oil supply ready for oil injection or pre-mix use.

Key Features

• Direct Injection Formula: Engineered for direct injection outboard systems, including high-performance marine engines that require TC-W3 certified protection.
• Advanced Deposit Control: Helps reduce ring sticking, deposit formation, and exhaust port blockage for easier starting and cleaner engine operation.
• Marine-Grade Protection: Exceeds JASO, ISO, API, and NMMA TC-W3 lubricant standards to help extend engine life in harsh marine environments.

Boat owners choose Sierra marine lubricants because they deliver dependable protection without compromising engine warranty requirements. This synthetic-style TC-W3 outboard oil is suitable for oil injection systems or pre-mix applications and is formulated to perform well even in demanding operating conditions. It is also designed to provide reduced aquatic toxicity compared with many conventional outboard oils, making it a smart option for serious marine use.

Sierra has built a strong reputation in marine engine parts and maintenance, and this 1-gallon outboard oil is a practical choice for Mercury, Yamaha, Evinrude, Johnson, and other compatible 2-stroke marine engines requiring TC-W3 oil. Packaged as a single gallon jug, it offers a convenient size for maintenance shops, marinas, and individual boat owners alike.