Keep your marine engine running smoothly with Indmar 5W-30 Marine Engine Oil. This synthetic blend inboard oil is specifically engineered for marine applications, delivering superior protection in demanding watercraft conditions. Specially formulated for Indmar Marine Engines and recommended for Raptor 400 & 440 models, this premium 1-gallon lubricant helps maintain optimal engine performance. The 5W-30 viscosity grade provides excellent cold-start protection while maintaining strong oil film strength at higher operating temperatures. This marine-grade oil helps protect against wear, corrosion, and deposits that commonly affect boat engines. Its specialized formulation considers the unique challenges of marine environments, including extended idle periods and varying load conditions. Trust this professional-grade engine oil to help maximize the longevity and reliability of your marine engine investment.