What oil do you use in a ford 289 v8?

For a Ford 289 V8, it's generally recommended to use a high-quality motor oil with a viscosity of 10W-30 or 20W-50, depending on the climate and operating conditions. Look for oil that meets or exceeds API service classifications, such as SN or newer. Additionally, consider using oil with zinc (ZDDP) additives for better protection of the engine's flat-tappet camshaft. Always refer to the owner's manual or manufacturer's recommendations for specific guidance.