Lucas Oil Synthetic Blend 2-Cycle Marine Oil has been specifically formulated for the performance requirements of water-cooled 2-cycle outboards and personal watercraft. Synthetic Blend 2-Cycle Marine Oil is fortified with our unique Lucas additive chemistry and an ash-less detergent inhibitor package to minimize spark plug fouling, pre-ignition, and ring sticking. Mix ratio is 50:1 and recommended for use in pre-mix or direct injection systems. NMMA TC-W3 certified (RL-13125P)