If you don't have the owner's manual, you can try these options:
* Check the oil fill cap: Sometimes the recommended oil type is printed on the oil fill cap.
* Look for a sticker under the hood: Many cars have a sticker under the hood that details maintenance information, including oil type.
* Use a vehicle identification number (VIN) lookup: Many online resources allow you to enter your vehicle's VIN to get specifications, including recommended oil. Be cautious about which website you use, making sure it's reputable.
Without knowing the specific engine, giving you a definitive answer is impossible and could potentially damage your engine. Always consult your owner's manual or a reliable source that considers the specific engine in your 1993 Chrysler Sebring.