What coolant to use on 2002 Ford Ranger?

For a 2002 Ford Ranger, it is recommended to use a coolant that meets Ford specification WSS-M97B51-A1. Typically, a 50/50 mixture of ethylene glycol-based antifreeze and distilled water is suitable. It's important to use a coolant that is specifically formulated for aluminum engines to prevent corrosion. Always check the owner's manual for any specific recommendations or requirements.