The recommended oil grade for a Chrysler Cirrus depends on the year and engine of your vehicle. You
must check your owner's manual for the specific recommendation. The manual will list the recommended oil viscosity (like 5W-30 or 10W-40) and the type of oil (conventional, synthetic blend, or full synthetic).
Looking up the information online without knowing the specific year and engine will only give you potentially incorrect information and could damage your engine. The owner's manual is the definitive source.