To help reduce emissions, some four-stroke marine engines are now equipped with exhaust aftertreatment devices. To stay on top of this latest technology, AMSOIL has recently upgraded the both of the Formula 4-Stroke Marine Synthetic Motor Oils (WCT, WCF) formulations to make it catalyst compatible. Its packaging now includes the new FC-W Catalyst Compatible logo and corresponding certification number (FC-00358P [WCT], FC-00357P [WCF]). The formulation is backward-compatible, continuing to provide outstanding protection where FC-W oils are recommended. Formula 4-Stroke Marine Oil now also meets API SM qualifications.
Formula 4-Stroke Marine Synthetic Motor Oil is certified by the National Marine Manufacturers Association (NMMA) for use in four-stroke outboard motors. This high-quality oil demonstrates outstanding performance and meets the NMMA FC-W Catalyst Compatible specification requirements.