If you don't have the owner's manual, you can:
* Look on the oil fill cap: Sometimes the recommended oil type is printed on the cap.
* Check the sticker under the hood: Many vehicles have a sticker under the hood that lists maintenance information, including recommended oil type.
* Use a vehicle identification number (VIN) lookup: Several online tools allow you to enter your VIN and find specifications for your specific vehicle. However, be cautious and only use reputable sites.
Without knowing the specific engine, providing a definitive answer is impossible and potentially harmful to your engine. Always consult your owner's manual for accurate information.