However, generally speaking, a 1995 Ford Bronco likely used SAE 10W-30 or SAE 5W-30 motor oil. The specific oil type (conventional, synthetic blend, or full synthetic) is up to you and your preference, but always check the owner's manual for recommendations regarding the weight and type. The manual will also specify the correct oil capacity for your specific engine.
Before adding any oil, always double-check your owner's manual for the exact specifications recommended by Ford for your Bronco's engine. Using the wrong oil can damage your engine.