What type of oil do I put in a 351 Cleveland?

For a 351 Cleveland engine, it's recommended to use a high-quality motor oil with a viscosity of 10W-30 or 10W-40, depending on the climate and operating conditions. Look for oil that meets or exceeds API specifications for better performance and protection. Additionally, consider using oils with zinc additives if your engine has flat tappet camshafts to prevent wear. Always check your owner's manual for specific recommendations.