Outboard Oil 4 Stroke 10W40 Gallon | Star Brite 28200 Star Brite Gallon 10W-40 4 Stroke Outboard Oil | 28200 Gallon 10W-40 4 Stroke Outboard Oil Exceeds OEM requirements-will not void engine warrenty Surpasses API requirements for SJ, CF-4 and CH-4 Premium, synthetic blen engine oil designed for 4 stroke high-performance outboards, gasoline inboards and stern drives Additive package optimizes engine cleanliness, prevents sludge build up