* SAE 10W-30: This was a very common viscosity for that era and likely the recommendation for most engines, particularly if it's a naturally aspirated gasoline engine.
* SAE 5W-30: This is a slightly thinner oil, better for colder climates or engines that are prone to sludge. Again, check your manual.
Crucially: The owner's manual will also specify the oil type (conventional, synthetic blend, or full synthetic) and the correct API certification (e.g., API SG, SH, SJ). Using the incorrect oil can severely damage your engine.
To find the correct information:
1. Locate your owner's manual. This should specify the exact oil type and viscosity recommended by Ford for your specific Ranger's engine.
2. Look for an oil fill cap or dipstick. Sometimes, the recommended oil type is printed on these.
3. If you can't find your manual, use the engine code. The engine code is usually stamped on the engine block. This information, along with the year and model, can be used to look up the specifications online.
Do not rely solely on online advice. Using the wrong oil can lead to costly engine repairs. Always refer to your owner's manual.
