Ultra1Plus 2-Cycle TC-W3 Synthetic, 5 gal.

A: Hello, thank you for your question. Here is the information we received from the vendor: Is Ultra1Plus TC-W3 Synthetic also API-TC? No — and here’s why: • TC-W3 is the standard for marine, water-cooled two-stroke engines. These oils are ashless by design, preventing deposits in cooler, moisture-rich environments. • API-TC is the standard for air-cooled two-stroke engines like motorcycles, scooters, and handheld equipment. These require ash-containing detergents to protect engines running at much higher temperatures. • Because of this difference, an ashless TC-W3 oil cannot be API-TC compliant — the two standards are designed for different engines and conditions. Ultra1Plus TC-W3 Synthetic is NMMA-certified TC-W3, ensuring top protection for outboard motors and other water-cooled two-stroke engines. For customers who need it, Ultra1Plus also offers an API-TC compliant formula, specifically engineered for air-cooled, high-performance two-stroke engines.