You absolutely MUST check your owner's manual. It will specify the exact type and viscosity of oil recommended for your specific Sprinter engine. The manual will list the correct oil specification (e.g., CJ-4, MB 229.1, 229.3, 229.51, etc.). Using the wrong oil can severely damage your engine.
Failing that, you can:
* Check the oil fill cap: Sometimes the recommended oil type is printed on the cap itself.
* Look for a sticker under the hood: Many vehicles have stickers providing maintenance information, including oil type.
* Use a VIN decoder: Websites and tools exist that decode your Sprinter's Vehicle Identification Number (VIN) to identify the engine and then you can search for the recommended oil type based on that engine.
Do not rely on general advice found online without confirming it with your vehicle's documentation. The consequences of using the wrong oil are too great.