* SAE 5W-30: This is a common recommendation for many engines in that era, and a good starting point if you don't have your owner's manual.
* API certified oil: Make sure the oil meets the API (American Petroleum Institute) certification standards listed in your owner's manual. You'll see something like "API SM" or a later specification on the oil bottle.
Crucially: Do not rely solely on online advice. Your owner's manual will have the manufacturer's specific recommendation for your exact engine and operating conditions. This is the most important source of information. Using the wrong oil can damage your engine.
If you can't find your owner's manual, you can often find a digital copy online through the Dodge/Ram website or a reputable parts website using your VIN number.