The key feature of oils for outboard boat motors is the need for practically zero ash content,
as they are completely burned in the cylinder. Therefore, such oils are formulated using specially refined base oils
and special ash-free additive packages that help reduce carbon deposits on spark plugs,
increase engine life by 5–10% and lower the risk of engine failure.
In addition to performance requirements, oils for two-stroke outboard engines must also meet environmental standards:
ensuring low smoke levels and minimal impact on the surrounding water and air.

Oils based on the KIREI additive package meet all of the above requirements,
as KIREI Outboard TC-W3 200 contains ash-free dispersants, highly effective antioxidants,
detergent additives and corrosion inhibitors, which provide excellent lubricating properties,
anti-smoke performance, prevent carbon deposits on spark plugs,
and resist pre-ignition. Oils with the KIREI Outboard TC-W3 200 package are recommended for Mercury Marine, Yamaha, Suzuki, Tohatsu, BRP, Polaris, and Kawasaki engines.