2018 Ram 2500 Diesel: Oil Capacity Explained

by Alex Braham 45 views

Hey guys! If you're the proud owner of a 2018 Ram 2500 diesel, you know this truck is a beast. But to keep it running like one, you need to stay on top of your maintenance, and that includes knowing the correct oil capacity. So, let's dive into the details about the 2018 Ram 2500 diesel oil capacity and everything else you need to know to keep your engine purring.

Understanding Your 2018 Ram 2500 Diesel Engine

Before we get into the specifics of oil capacity, let's talk a bit about the engine itself. The 2018 Ram 2500 diesel typically comes with a 6.7-liter Cummins turbo diesel engine. This powerhouse is known for its reliability and impressive torque, making it a favorite for towing and heavy-duty work. Understanding the engine's capabilities and needs is the first step in ensuring it stays in top condition.

The 6.7L Cummins is a straight-six engine, renowned for its robust construction and durability. It features a cast-iron block and aluminum alloy cylinder head, designed to withstand the high pressures and temperatures associated with diesel combustion. This engine also incorporates a turbocharger to boost power and efficiency, making it a complex yet reliable piece of machinery.

One of the critical aspects of maintaining this engine is ensuring proper lubrication. The engine oil not only reduces friction between moving parts but also helps to cool the engine, clean away contaminants, and protect against corrosion. Using the correct type and amount of oil is vital for the longevity and performance of your Ram 2500's diesel engine. Regular oil changes and monitoring the oil level are essential maintenance tasks that can prevent costly repairs down the road. Additionally, it's important to be aware of the engine's specific needs, such as the recommended oil viscosity and any specific requirements outlined by Ram in the owner's manual. Keeping your engine well-lubricated will ensure it continues to deliver the power and reliability you expect from your Ram 2500.

What is the Oil Capacity of the 2018 Ram 2500 Diesel?

Okay, let’s get straight to the point. The 2018 Ram 2500 diesel with the 6.7-liter Cummins engine usually has an oil capacity of 12 US quarts (approximately 11.4 liters). However, always double-check your owner's manual to confirm this, as there can be slight variations depending on the specific model and any modifications.

Why is Knowing the Exact Oil Capacity Important?

  • Preventing Overfilling: Overfilling the engine with oil can lead to serious problems. When there's too much oil, the crankshaft can churn it into a frothy mess, reducing its ability to lubricate properly. This can cause increased friction, overheating, and potentially damage to the engine's internal components. Additionally, overfilling can put extra pressure on seals, leading to leaks. Nobody wants a leaky engine, right?
  • Avoiding Underfilling: On the flip side, not having enough oil is just as bad. Underfilling means that the engine parts aren't getting the lubrication they need, which can cause excessive wear and tear. This can lead to premature engine failure, which is a headache and a huge expense. Maintaining the correct oil level ensures that all critical components are adequately lubricated, reducing friction and preventing damage.
  • Ensuring Optimal Performance: Using the right amount of oil helps the engine run smoothly and efficiently. Proper lubrication reduces friction, which means the engine doesn't have to work as hard. This translates to better fuel economy and improved overall performance. Plus, a well-lubricated engine is less likely to overheat, even under heavy loads. Keeping your oil level spot-on ensures your Ram 2500 performs at its best, whether you're hauling equipment or cruising down the highway.

Choosing the Right Oil for Your 2018 Ram 2500 Diesel

Now that you know the oil capacity, let's talk about the type of oil you should be using. For the 2018 Ram 2500 diesel, it's generally recommended to use a high-quality diesel engine oil that meets the specifications outlined in your owner's manual. Typically, you'll want to look for an oil with a viscosity grade of 15W-40 or 5W-40, especially if you live in an area with colder temperatures.

Synthetic vs. Conventional Oil

  • Synthetic Oil: Synthetic oils are engineered to provide superior performance and protection compared to conventional oils. They are more resistant to breakdown under high temperatures and offer better lubrication at low temperatures. Synthetic oils also tend to have better detergency, which means they can keep your engine cleaner for longer. While they are more expensive, the benefits of using synthetic oil can outweigh the cost, especially for a heavy-duty truck like the Ram 2500 diesel. Many owners find that synthetic oils extend the life of their engine and provide better overall performance.
  • Conventional Oil: Conventional oils are a more budget-friendly option and are still suitable for use in the 2018 Ram 2500 diesel, provided they meet the manufacturer's specifications. However, they may not offer the same level of protection as synthetic oils, particularly under extreme conditions. If you opt for conventional oil, it's crucial to adhere to the recommended oil change intervals to ensure your engine remains properly lubricated and protected. Regular maintenance with conventional oil can still keep your truck running smoothly, but be mindful of the limitations compared to synthetic options.

Oil Brands

  • Shell Rotella: Shell Rotella is a popular choice among diesel truck owners. It's known for its robust formulation that provides excellent protection against wear and deposit buildup. Rotella oils are designed to withstand the demanding conditions of diesel engines, making them a reliable option for your Ram 2500.
  • Mobil Delvac: Mobil Delvac is another trusted brand in the diesel oil market. It offers superior oxidation control and helps to keep your engine clean. Many professional truckers and fleet operators rely on Mobil Delvac for its consistent performance and protection.
  • Valvoline Premium Blue: Valvoline Premium Blue is specifically endorsed by Cummins, the manufacturer of your truck's engine. This oil is formulated to meet the exact requirements of Cummins engines, ensuring optimal performance and protection. If you want an oil that's guaranteed to work well with your engine, Valvoline Premium Blue is an excellent choice.

Step-by-Step Guide to Changing Your 2018 Ram 2500 Diesel's Oil

Alright, now that you know the oil capacity and the right type of oil, let's walk through the process of changing your oil. Remember, safety first! Always wear gloves and eye protection when working with motor oil.

  1. Gather Your Supplies:
  • New oil (12 quarts of the recommended type)
  • New oil filter
  • Wrench for the oil drain plug
  • Oil filter wrench
  • Drain pan
  • Funnel
  • Gloves
  • Eye protection
  1. Warm Up the Engine:
  • Run the engine for a few minutes to warm up the oil. This helps it flow more easily.
  1. Position the Drain Pan:
  • Place the drain pan under the oil drain plug.
  1. Remove the Drain Plug:
  • Use the wrench to carefully remove the drain plug. Be careful, as the oil will be hot.
  • Allow all the old oil to drain completely.
  1. Replace the Oil Filter:
  • Use the oil filter wrench to remove the old oil filter.
  • Lightly lubricate the rubber gasket on the new oil filter with fresh oil.
  • Screw the new oil filter into place by hand until it's snug. Then, tighten it another half to three-quarters of a turn.
  1. Reinstall the Drain Plug:
  • Clean the drain plug and install a new crush washer if necessary.
  • Tighten the drain plug to the manufacturer's specified torque (check your manual for the correct value).
  1. Add New Oil:
  • Remove the oil filler cap on top of the engine.
  • Use the funnel to pour in 12 quarts of new oil.
  1. Check the Oil Level:
  • Wait a few minutes for the oil to settle.
  • Pull out the dipstick, wipe it clean, and reinsert it fully.
  • Pull the dipstick out again and check the oil level. It should be between the minimum and maximum marks.
  • Add more oil if necessary to reach the correct level.
  1. Start the Engine:
  • Start the engine and let it run for a few minutes.
  • Check for any leaks around the drain plug and oil filter.
  1. Reset the Oil Life Monitor:
  • Follow the instructions in your owner's manual to reset the oil life monitor.

Common Issues Related to Oil Capacity

Even if you're diligent about maintaining your 2018 Ram 2500 diesel, you might still encounter some issues related to oil capacity. Here are a few common problems and how to address them:

  • Low Oil Pressure: If you notice the low oil pressure warning light, it could be a sign of low oil level or a failing oil pump. Check the oil level immediately and add oil if needed. If the problem persists, have your truck inspected by a professional mechanic.
  • Oil Leaks: Oil leaks can occur from various places, such as the drain plug, oil filter, or seals. Regularly inspect your engine for signs of leaks and address them promptly to prevent further damage.
  • Excessive Oil Consumption: Some engines may consume more oil than others. If you find yourself needing to add oil frequently, it could indicate worn piston rings or valve seals. A compression test can help diagnose the issue.

Conclusion

Knowing the 2018 Ram 2500 diesel oil capacity and using the correct type of oil are crucial for maintaining the health and performance of your truck's engine. By following the guidelines and tips outlined in this article, you can ensure that your engine stays properly lubricated and protected, providing you with years of reliable service. Happy trucking, guys! And remember, a little maintenance goes a long way.