What type of oil does a 1990 Ford Ranger take?

The type of oil a 1990 Ford Ranger takes depends on the engine it has. Ford Rangers of that year came with several different engine options. To know for sure, you need to check your owner's manual.

However, generally speaking, 1990 Ford Rangers used conventional motor oil, and the recommended weight was typically SAE 10W-30 or SAE 20W-40. The specific weight and type (conventional, synthetic blend, or full synthetic) might be specified in your owner's manual, and may depend on the climate where you live. Always consult your owner's manual for the definitive answer.