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In 2019, the Ram 3500 has a DEF tank capacity of 5.5 gallons. There are several potential issues you may encounter with the engine. These include excessive oil consumption, which may necessitate more frequent oil changes. An especially serious concern is the engine overheating, which could result in fires or even the car exploding. It's important to promptly address any loose gaskets or loose spark plugs to avoid engine complications. Oil leaks should be repaired promptly, and coolant should be replaced every 60,000 miles. Spark plugs should be replaced every 100,000 miles, except for copper ones, which should be changed every 30,000 miles. The air filter should be replaced every 15,000 to 30,000 miles.
The 2019 Ram 3500's DEF tank has a capacity of 5.5 gallons for the fluid.