What kind of oil does a MerCruiser 5.7 take?

Engine Oil Application Recommended Oil All MerCruiser engines Mercury MerCruiser Full-Synthetic Engine Oil, 20W-40, NMMC FC-W rated Click to see full answer. Similarly, you may ask, what oil does a 350 MerCruiser take?The owners manual suggest 40W (for our temp range) or 25w – 40w merc. Murrys or Kmart usually has the val 40w oil.One may also ask, can you use regular motor oil in a boat? Use the right lubricant —Marine and auto oil are not interchangeable. Although oil in a four-stroke marine engine performs the same function as it does in an automobile engine, passenger car motor oil should not be used in marine engines. Car oils also fall short in the protection department. Accordingly, what kind of oil does my boat take? If you operate your boat in consistent temperatures, choose a single-weight oil (e.g. SAE 30). If you operate your boat in a wider temperature range, select multi-viscosity oils (e.g. SAE 10W-30). They behave like thin oils in cold weather, making it easier to crank the engine.How much HP does a 5.7 MerCruiser have?The Mercruiser 5.7 liter marine engine is offered in three different configurations. The standard 5.7 has a propshaft rating of 250 horsepower. The 5.7 EFI or electronic fuel-injected model produces 260 horsepower. The 350 Magnum MPI or Multi Port Fuel Injection engine is rated at 300 propshaft horsepower.
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