Approved for use in all 4-stroke outboard engines, this oil includes a special additive package for outstanding performance in the marine environment.This oil ontains significantly more performance additives than automotive oils to stand up to the rigors of the 4-stroke outboard environment. It also contains special viscosity improvers for optimum performance in high-rpm 4-stroke outboards. Meets API service requirements of SJ, CF-2, CH-4.FC-W and FC-W Catalyst CompatibleMeets API service requirements of SJ, CF-2, CH-4Offers industry-leading strength and viscocity retention and ultimate corrosion and wear protectionApproved for use in all 4-stroke outboard engines