However, generally speaking, older Ford Bronco engines often used conventional oil. The weight (e.g., 10W-30, 10W-40, 20W-40) will also be specified in your owner's manual. It's crucial to use the recommended weight to ensure proper lubrication and engine performance. Using the wrong weight could damage your engine.
If you don't have the owner's manual, you can try:
* Finding a digital copy online: Search for "1990 Ford Bronco owner's manual" (and specify the engine if you know it).
* Checking a Ford dealership: They might have access to digital versions or be able to look up the specifications based on your Bronco's VIN.
* Checking the oil fill cap or dipstick: Sometimes, the recommended oil type is printed on these.
Do not guess. Using the incorrect oil can severely damage your engine. Consult your owner's manual or a Ford dealership for the correct information.
