Yes, but it depends on your exact model year and engine. Always check the owner's manual to confirm whether 5W-30 is an approved alternative for your Chrysler 300.
Engine variants and official guidance
The Chrysler 300 has used several engines over its lifespan, including V6 and Hemi options such as the 3.5L/3.7L, the 3.6L Pentastar, and the 5.7L/6.4L Hemi. Each engine family carries its own viscosity guidance in the manual. In many recent models, 5W-20 is listed as the baseline oil viscosity, and 5W-30 may be permitted as an alternative under certain ambient temperatures or driving conditions. Oils should meet Chrysler's specification MS-6395 or the current API/ILSAC standard. To be sure, consult the specific chart for your year and engine in the manual or ask a Chrysler dealer.
What to check for your specific engine
Locate the exact viscosity guidance in your owner's manual under Engine Oil Recommendations, or inspect the oil fill cap for the approved grade. If your manual lists 5W-20 as standard but allows 5W-30 as an acceptable alternative, you can use 5W-30 provided it also meets the required Chrysler specification (MS-6395 or the current standard).
How to switch to 5W-30 safely
If you decide to use 5W-30, ensure the oil you buy meets the appropriate specification (Chrysler MS-6395 or the current API/ILSAC standard) and that it is compatible with your climate and driving conditions. Use the correct oil type (conventional, synthetic, or synthetic-blend) as permitted by your manual, and adhere to the recommended oil change intervals. If in doubt, consult your dealer or a qualified technician.
Bottom line
In many Chrysler 300 engines, 5W-30 can be an approved alternative to the standard viscosity, but it is not universal. The definitive source is your owner's manual, and a dealership can confirm compatibility for your VIN and year.
Summary
Overall, 5W-30 is often acceptable for a Chrysler 300, depending on engine type and climate. The most reliable guidance comes from the vehicle-specific manual, which will specify whether 5W-30 is allowed and what other requirements (such as MS-6395) must be met. When in doubt, stick to the manual or seek professional advice to avoid potential warranty or engine wear concerns.