2018 Ram 3500 Diesel Oil Capacity: Your Complete Guide

by Alex Braham 55 views

Hey there, gearheads! If you're rolling around in a 2018 Ram 3500 with a diesel engine, you know you've got a beast on your hands. But keeping that beast running smoothly means staying on top of its maintenance, and a crucial part of that is knowing the oil capacity. This guide will dive deep into everything you need to know about the 2018 Ram 3500 diesel oil capacity, from the exact amount of oil to use, the best oil to choose, and even some helpful tips to make your oil changes a breeze. So, grab your wrench and let's get started!

Understanding the 2018 Ram 3500 Diesel Engine Options

Before we get down to the nitty-gritty of oil capacity, it's essential to understand the different engine options available for the 2018 Ram 3500. Knowing which engine you have is the first step in ensuring you use the correct amount of oil. The 2018 Ram 3500 was primarily offered with two diesel engine choices:

  • 6.7L Cummins Turbo Diesel: This is the workhorse of the Ram lineup, known for its incredible torque and towing capabilities. It's a straight-six engine that's been a staple in Ram trucks for years, and it's a favorite among truck enthusiasts for its reliability and power.
  • 6.7L High Output (HO) Cummins Turbo Diesel: An upgraded version of the standard 6.7L, the HO engine delivers even more horsepower and torque, making it ideal for heavy-duty towing and hauling. This engine is usually found in higher trim levels or as an optional upgrade. The HO engine is renowned for its durability and performance under strenuous conditions.

It's important to identify which engine your Ram 3500 has. The oil capacity can vary slightly depending on the engine. If you're unsure, you can find this information in your owner's manual or by checking the engine compartment for a sticker that specifies the engine type. Now that you've got the engine type sorted, you can find the correct oil capacity.

The Exact 2018 Ram 3500 Diesel Oil Capacity

Alright, let's get to the main event: the oil capacity! Knowing the right amount of oil to use is critical for your engine's health. Too little, and you risk damaging engine components due to insufficient lubrication. Too much, and you could cause pressure issues and leaks. Here's the lowdown on the oil capacity for both of the 6.7L Cummins diesel engine options in the 2018 Ram 3500:

  • 6.7L Cummins Turbo Diesel: The standard 6.7L Cummins engine typically requires 10 quarts (9.5 liters) of oil when you include the oil filter change. This is a pretty standard amount for a heavy-duty diesel engine, and it ensures that all your engine components are well-lubricated. Always double-check your owner's manual to confirm these figures.
  • 6.7L High Output (HO) Cummins Turbo Diesel: The High Output version also usually takes 10 quarts (9.5 liters) of oil, including the filter. Make sure to consult your owner's manual before the oil change to verify. Again, it is critical to use the correct amount, not more or less, to maintain engine performance and longevity.

Remember, these figures are for an oil change that includes replacing the oil filter. If you're just topping off the oil, you'll obviously need a smaller amount. Always check the dipstick to make sure you're within the correct range after adding oil. Using the right amount of oil, along with the right type, is one of the most important things you can do to keep your diesel running smoothly and for a long time. So, measure carefully, and your truck will thank you.

Choosing the Right Oil for Your 2018 Ram 3500 Diesel

So, you know how much oil your truck needs, but what kind of oil should you use? Selecting the right oil is just as important as using the correct amount. Diesel engines, especially those in heavy-duty trucks like the Ram 3500, require specific types of oil designed to handle the high pressures, temperatures, and soot produced by diesel combustion. Here are some key factors to consider when choosing oil for your 2018 Ram 3500 diesel:

  • Oil Type: You'll want to use a heavy-duty diesel engine oil (HDEO). Look for oils that meet the API (American Petroleum Institute) CJ-4 or CK-4 specifications. These ratings indicate that the oil has been tested and meets the industry standards for diesel engines, providing excellent protection against wear, deposits, and soot. Don't cheap out here; it's an investment in your engine's long-term health.
  • Viscosity: The recommended viscosity grade for the 6.7L Cummins is typically 15W-40. This means the oil has a viscosity of 15 when cold and 40 when hot. However, depending on your climate, you might consider other options. In colder climates, a 5W-40 oil might be a better choice as it flows more easily when cold, providing better initial lubrication during startup. Always consult your owner's manual for the manufacturer's recommendations.
  • Synthetic vs. Conventional: You can choose between conventional, synthetic blend, or full synthetic oil. Full synthetic oils generally offer superior performance, especially in extreme temperatures. They provide better protection against wear and tear and can extend the interval between oil changes. While more expensive, synthetic oils often provide better value over the long run, and can help to keep your engine in great condition. For the 2018 Ram 3500 diesel, using a high-quality synthetic oil is often the best choice for overall engine protection and longevity.
  • Oil Filters: Don't forget to use a high-quality oil filter designed for diesel engines. These filters are specifically designed to trap soot and other contaminants that are common in diesel engines. A good filter will protect your engine and help extend the life of your oil. Consider brands like Mopar, Fleetguard, or Baldwin for reliable filtration.

By choosing the right oil and filter, you can help to ensure that your 2018 Ram 3500 diesel engine remains in top condition for years to come. Make sure you regularly check the oil level with the dipstick and maintain a consistent oil change schedule.

Step-by-Step Guide to Changing the Oil in Your 2018 Ram 3500 Diesel

Changing the oil in your 2018 Ram 3500 diesel might seem like a daunting task, but it's a straightforward process that you can easily do at home with the right tools and a little bit of know-how. This section will guide you through the process, making it easy to keep your truck running smoothly. Follow these steps for a successful oil change:

  1. Gather Your Supplies: Before you start, gather everything you'll need. This includes the correct amount of the right type of oil (as discussed above), a new oil filter, an oil filter wrench, a wrench to remove the drain plug, a drain pan to catch the old oil, jack stands, gloves, and rags or paper towels. Having everything ready will make the process much smoother.
  2. Warm Up the Engine: Run the engine for a few minutes to warm up the oil. Warm oil flows more easily and will carry more contaminants with it when drained. This step isn't crucial, but it will help to ensure that you get as much of the old oil out of your engine as possible.
  3. Prepare Your Truck: Park your truck on a level surface and engage the parking brake. Then, using jack stands, safely lift the front of the truck. This will give you easier access to the oil drain plug and oil filter. Always use jack stands – never rely on just a jack.
  4. Locate the Oil Drain Plug: Crawl under your truck and locate the oil drain plug on the oil pan. Place your drain pan directly beneath the drain plug to catch the old oil. Use the correct-sized wrench to loosen and remove the drain plug. Be careful; the oil will be hot.
  5. Drain the Oil: Allow the oil to drain completely. This can take 15-20 minutes. While the oil is draining, you can move on to the next step.
  6. Remove the Oil Filter: Locate the oil filter. Place the drain pan under the filter, then use the oil filter wrench to loosen and remove the old oil filter. Be prepared for some oil to spill. Before installing the new filter, lightly lubricate the rubber gasket on the new filter with fresh oil.
  7. Install the New Oil Filter: Screw the new oil filter onto the engine. Tighten it by hand until the gasket makes contact, then tighten it according to the instructions on the filter (usually about a half to three-quarters of a turn).
  8. Replace the Drain Plug: Once the oil has finished draining, clean the drain plug and install a new crush washer (if your plug has one). Tighten the drain plug to the manufacturer's specifications. Don't overtighten it.
  9. Add New Oil: Lower your truck and remove the jack stands. Open the oil fill cap on the engine and add the correct amount of fresh oil. Use a funnel to avoid spills. Check your owner's manual for the exact amount. Remember, it's about 10 quarts (9.5 liters) for both 6.7L Cummins engines.
  10. Check the Oil Level: After adding the oil, use the dipstick to check the oil level. Add more oil if needed to reach the “full” mark. You can always add more, but it’s harder to take out excess oil. Make sure the level is correct.
  11. Start the Engine and Check for Leaks: Start the engine and let it run for a few minutes. Check for any leaks around the oil filter and the drain plug. If you see any leaks, shut off the engine immediately and tighten the filter or plug as needed.
  12. Dispose of Old Oil Properly: Finally, dispose of the old oil and filter at a local recycling center or auto parts store. Never pour oil down the drain or into the environment.

Changing the oil in your 2018 Ram 3500 diesel doesn't have to be intimidating. By following these steps, you can save money and keep your truck in top condition.

Important Maintenance Tips for Your 2018 Ram 3500 Diesel

Beyond knowing the oil capacity and changing your oil regularly, several other maintenance tips can help keep your 2018 Ram 3500 diesel running smoothly and reliably for years to come. Following a good maintenance schedule is crucial. Here are a few key points to remember:

  • Oil Change Intervals: Stick to the recommended oil change intervals in your owner's manual. For most diesel engines, this is typically every 5,000 to 7,500 miles, or every six months, but this can vary depending on your driving conditions and the type of oil you use. If you do a lot of heavy-duty towing, off-roading, or stop-and-go driving, you may need to change the oil more frequently. Regularly changing your oil is critical.
  • Fuel Filter Replacement: Diesel fuel systems are sensitive to contaminants, so replacing the fuel filter regularly is crucial. The fuel filter helps protect the fuel injectors from damage. The recommended interval for the fuel filter is usually every 15,000 miles, but check your owner's manual for the specifics. Replacing the fuel filter is a key maintenance task.
  • Air Filter Replacement: A clean air filter is essential for optimal engine performance and fuel efficiency. Replace the air filter as needed, usually every 15,000 to 30,000 miles, or more often if you drive in dusty conditions. Always ensure your air filter is up to the task.
  • Coolant System Maintenance: Keep an eye on your coolant levels and ensure your cooling system is in good condition. Use the correct type of coolant recommended for your engine. Flush and replace the coolant at the recommended intervals, as this helps prevent overheating and corrosion. Properly maintaining your cooling system is very important for the longevity of your engine.
  • Regular Inspections: Perform regular visual inspections of your engine and related components. Look for leaks, check fluid levels, and listen for any unusual noises. Catching potential problems early can save you from costly repairs down the line. A proactive approach is always best.
  • Professional Servicing: Consider having a professional mechanic inspect your truck regularly, especially if you're not comfortable with more complex maintenance tasks. A trained technician can identify potential problems and perform necessary repairs or maintenance. Professional help can be a great asset.

By following these maintenance tips, you can extend the life of your 2018 Ram 3500 diesel and keep it performing at its best. Remember, regular maintenance is an investment in your truck's longevity and reliability.

Conclusion: Keeping Your 2018 Ram 3500 Diesel Running Strong

So there you have it, folks! Your complete guide to the 2018 Ram 3500 diesel oil capacity, choosing the right oil, changing your oil, and essential maintenance tips. Keeping up with your truck's maintenance is crucial for ensuring its longevity and optimal performance. Knowing the correct oil capacity of 10 quarts (9.5 liters) and using a high-quality diesel engine oil are fundamental steps in maintaining your beast. Follow the step-by-step guide to change your oil. Don’t forget to replace the oil filter, and dispose of the old oil responsibly.

Remember to consult your owner's manual for specific recommendations tailored to your truck. By following these guidelines, you'll be well on your way to keeping your 2018 Ram 3500 diesel running smoothly for many miles to come. Happy trucking, and safe travels, everyone! With a little bit of care and attention, your truck will reward you with years of dependable service. Now get out there and enjoy the open road! Keep that engine happy and healthy, and it will keep you moving.