2018 Ram 1500 Diesel Oil Change: A Step-by-Step Guide

Nov 18, 2025 by Alex Braham 54 views

2018 Ram 1500 Diesel Oil Change: A Comprehensive Guide

Hey guys, if you're a proud owner of a 2018 Ram 1500 Diesel, then you already know you've got a seriously impressive truck on your hands. But, just like any other vehicle, your Ram needs regular maintenance to keep it running smoothly and efficiently. And one of the most crucial maintenance tasks is the oil change. This guide will walk you through a 2018 Ram 1500 diesel oil change, ensuring you have all the info you need to tackle this job yourself, saving you some cash and getting you better acquainted with your awesome ride. We'll cover everything from the necessary tools and supplies to the step-by-step process, with some extra tips and tricks sprinkled in along the way. Get ready to dive in and become an oil-changing pro!

Why Regular Oil Changes Matter for Your 2018 Ram 1500 Diesel

Alright, before we get our hands dirty, let's chat about why oil changes are so darn important, especially for your 2018 Ram 1500 diesel. Think of your engine oil as the lifeblood of your truck. It lubricates all the moving parts, reducing friction and wear. Over time, the oil breaks down and gets contaminated with dirt, debris, and combustion byproducts. If you leave old, dirty oil in your engine, it can lead to some serious problems, including reduced engine performance, increased fuel consumption, and, ultimately, costly engine damage. Regular oil changes keep your engine clean and well-lubricated, extending its life and ensuring optimal performance. For a diesel engine, which operates under more strenuous conditions than a gasoline engine, this is even more critical. Diesel engines produce more soot and contaminants, so the oil needs to be changed more frequently to maintain its effectiveness. Ignoring oil changes is like neglecting your health – eventually, things will start to break down. So, stick to a regular schedule, and your Ram will thank you. Moreover, when you perform an oil change, you're not just swapping out the oil. You're also inspecting other components, which could help you catch issues early. It could save you from much bigger repair costs in the future. Regular oil changes are a small price to pay for the long-term health and performance of your truck. Plus, doing it yourself gives you a deeper connection with your vehicle and allows you to catch any potential problems before they become serious issues. Let's get started!

Tools and Materials You'll Need for the Oil Change

Okay, guys, let's get you geared up with everything you'll need for your 2018 Ram 1500 diesel oil change. Having the right tools and materials will make the job much easier and more enjoyable. Trust me; there's nothing worse than getting halfway through the job and realizing you're missing something. Here's what you'll need:

New Oil: This is the star of the show! For your 2018 Ram 1500 diesel, you'll need the correct type of oil. Refer to your owner's manual for the specific oil weight and specification. Typically, you'll need a full synthetic oil that meets the API CK-4 or FA-4 standards. This ensures it's designed for diesel engines. You'll likely need around 10 quarts, so grab a few extra just in case.
Oil Filter: Don't forget the oil filter! It's essential to replace it with every oil change. Your owner's manual will tell you the correct filter type. Make sure it's a quality filter to protect your engine.
Oil Filter Wrench: You'll need a wrench designed specifically for removing the oil filter. There are various types, so choose one that fits your filter.
Wrench for the Drain Plug: A wrench of the correct size to remove the oil drain plug. This is usually a standard size, but it's always good to check.
Oil Drain Pan: A large pan to catch the old oil as it drains. Get one with a spout for easy disposal.
Funnel: To help pour the new oil into the engine without making a mess.
Jack and Jack Stands (or Ramps): You'll need to lift the front of your truck to access the oil drain plug and oil filter. Jack stands are crucial for safety if you're using a jack.
Wheel Chocks: To ensure your truck doesn't roll while you're working.
Gloves: To keep your hands clean. Latex or nitrile gloves work great.
Rags or Paper Towels: For wiping up spills and cleaning up.
Torque Wrench: To tighten the drain plug and oil filter to the correct specifications (optional, but recommended).
Safety Glasses: Eye protection is a must when working under a vehicle.

Make sure to gather all these items before you start the oil change process. It's also a good idea to have some cardboard or a creeper to lie on while you're under the truck. With everything ready, you're one step closer to a successful oil change!

Step-by-Step Guide to Changing the Oil on Your 2018 Ram 1500 Diesel

Alright, buckle up, guys! Now for the main event: the 2018 Ram 1500 diesel oil change step-by-step guide. Follow these instructions carefully, and you'll have fresh oil coursing through your engine in no time. Safety first, and always consult your owner's manual for specific instructions and torque specifications.

Prepare the Truck: Park your Ram on a level surface and engage the parking brake. Place wheel chocks behind the rear wheels for extra safety. If the engine is hot, let it cool down for at least 30 minutes. This will prevent burns when handling hot oil.
Raise the Truck: Using your jack and jack stands (or ramps), safely lift the front of your truck. Place the jack stands under the frame in the designated areas. Always ensure the truck is stable before working underneath it.
Locate the Oil Drain Plug and Oil Filter: The oil drain plug is usually located on the bottom of the oil pan. The oil filter is typically located near the engine block. Consult your owner's manual if you're having trouble locating them.
Position the Drain Pan: Place your oil drain pan under the oil drain plug, making sure it's positioned to catch the oil stream.
Remove the Oil Drain Plug: Using the correct wrench, carefully remove the oil drain plug. Be prepared for the oil to start flowing out immediately. Let the oil drain completely. This can take about 15-20 minutes. Inspect the drain plug for damage and replace it if necessary. If your drain plug has a crush washer, replace it. You may also notice a washer at the end of the drain plug, this may need to be replaced too, it is very important. This is one thing that will cause the oil pan to leak, which can be an expensive repair!
Remove the Oil Filter: While the oil is draining, locate and remove the oil filter. Use the oil filter wrench to loosen the filter. Be prepared for some oil to spill. Unscrew the filter by hand and remove it. Before installing the new filter, lubricate the rubber gasket on the new filter with fresh oil.
Install the New Oil Filter: Screw the new oil filter onto the engine by hand until the gasket makes contact. Then, tighten it according to the instructions on the filter or your owner's manual, usually about 1/2 to 3/4 of a turn. Don't overtighten it.
Reinstall the Oil Drain Plug: Once the oil has completely drained, clean the oil drain plug and reinstall it. Tighten the plug to the manufacturer's specified torque using a torque wrench. Check your owner's manual for the correct torque specification. If you don't have a torque wrench, tighten it snugly but don't overtighten.
Lower the Truck: Carefully lower the truck using the jack or ramps.
Add New Oil: Locate the oil fill cap on the engine. Remove the cap and insert the funnel. Pour in the correct amount of new oil, referring to your owner's manual for the exact quantity (usually around 10 quarts). Use a funnel to prevent spills.
Check the Oil Level: Replace the oil fill cap. Start the engine and let it run for a few minutes. Check for any leaks around the oil drain plug and oil filter. Turn off the engine and let it sit for a few minutes to allow the oil to settle. Pull out the dipstick, wipe it clean, reinsert it fully, and then remove it again. Check the oil level. Add more oil if needed to bring it up to the full mark.
Reset the Oil Life Indicator: Most modern vehicles have an oil life monitoring system. Consult your owner's manual for instructions on how to reset this system after an oil change. This ensures that the system accurately tracks your oil life. This is something that many forget!
Dispose of the Old Oil and Filter: Properly dispose of the used oil and oil filter at a recycling center or auto parts store. Never pour oil down the drain or into the environment.
Clean Up: Wipe up any spills and clean your tools. You're done! And pat yourself on the back for a job well done. You saved some money and learned a bit more about your awesome truck.

Tips and Tricks for a Smooth Oil Change Experience

Alright, guys, let's sprinkle in some pro tips to make your 2018 Ram 1500 diesel oil change even smoother. These little tricks can save you time, effort, and possibly a few headaches. Here we go!

Warm Up the Engine: Run the engine for a few minutes before draining the oil. This helps warm the oil, making it flow more easily and removing more contaminants. Just be careful; don't make it too hot to handle.
Use the Right Tools: Using the right tools makes all the difference. Invest in a good oil filter wrench, a torque wrench, and a decent set of ramps or jack stands. It'll make the job much easier and safer.
Pre-Fill the Oil Filter: Before installing the new oil filter, fill it partially with fresh oil. This helps prime the engine and reduces the time it takes for oil pressure to build up after starting the engine. Just be careful not to spill any.
Check for Leaks: After starting the engine and letting it run for a few minutes, carefully check for any leaks around the oil drain plug and oil filter. If you see any leaks, tighten the components slightly. If the leak persists, you may need to replace the drain plug or filter.
Keep Your Workspace Clean: Having a clean workspace is crucial. Lay down some cardboard or use a creeper to keep yourself clean while working under the truck. This also helps prevent any accidental spills from spreading.
Have a Buddy: Having a friend to help out can make the job much easier, especially if you're new to oil changes. They can hand you tools, offer a second set of eyes, and provide moral support.
Take Your Time: Don't rush the process. Take your time and double-check your work at each step. This ensures that you don't miss anything and that everything is done correctly.
Keep Records: Keep a record of your oil changes, including the date, mileage, oil type, and filter used. This helps you track your maintenance schedule and can be helpful if you ever need to troubleshoot any engine problems.
Safety First: Always prioritize safety. Wear safety glasses, use jack stands, and work in a well-ventilated area. If you're unsure about any step, consult your owner's manual or a professional mechanic.
Consider a Filter Relocation Kit: If you do a lot of oil changes or find the oil filter difficult to access, consider installing an oil filter relocation kit. This moves the oil filter to a more accessible location, making future oil changes much easier.

Following these tips and tricks will help you perform a successful and stress-free 2018 Ram 1500 diesel oil change every time. It's about saving time, getting the job done right, and ensuring your truck stays in top-notch condition.

Common Mistakes to Avoid During Your 2018 Ram 1500 Diesel Oil Change

Alright, guys, let's talk about some common mistakes to avoid during your 2018 Ram 1500 diesel oil change. Preventing these errors will not only make the process smoother but also protect your engine from potential damage. Here’s what you should watch out for:

Using the Wrong Oil: One of the most critical mistakes is using the wrong type of oil. Your diesel engine requires a specific type of oil (usually full synthetic) that meets the API CK-4 or FA-4 standards. Using the wrong oil can lead to inadequate lubrication, increased wear, and potential engine damage. Always double-check your owner's manual for the recommended oil type and specifications.
Overtightening the Drain Plug or Oil Filter: Overtightening can damage the drain plug threads or crush the oil filter gasket, leading to leaks. Always use a torque wrench to tighten these components to the manufacturer's specified torque. If you don't have a torque wrench, tighten the components snugly, but avoid excessive force.
Not Replacing the Oil Filter: Never skip replacing the oil filter. The filter removes contaminants from the oil, and if it's not replaced, dirty oil can circulate through your engine, leading to increased wear and tear. Always replace the filter with a new one every time you change the oil.
Stripping the Drain Plug Threads: This is a problem if you overtighten the drain plug. This can create a costly repair. Make sure you get the correct sized wrench and torque to the specification of the owner's manual.
Forgetting to Lubricate the Oil Filter Gasket: Before installing the new oil filter, apply a thin film of fresh oil to the rubber gasket. This helps create a proper seal and prevents leaks. Skipping this step can lead to oil leaks and potential engine damage.
Not Checking the Oil Level: After adding new oil, always check the oil level with the dipstick. Start the engine, let it run for a few minutes, then turn it off and let it sit for a few minutes to allow the oil to settle. Check the dipstick again and add more oil if needed to reach the full mark.
Improper Disposal of Used Oil and Filter: Never pour used oil down the drain or into the environment. Dispose of it properly at a recycling center or auto parts store. They can safely handle the used oil and filter. Always follow your local regulations for disposal.
Not Using Jack Stands: Never work under your truck without using jack stands. A jack alone can fail, and you could be seriously injured. Jack stands provide a stable and safe support for your vehicle while you're working underneath it.
Forgetting to Reset the Oil Life Indicator: After changing the oil, don't forget to reset the oil life indicator in your truck's computer. The system needs to be reset so it can accurately monitor your oil life going forward. If you don't reset it, the system will continue to show that the oil needs to be changed and you will get inaccurate information. Refer to your owner's manual for instructions on how to reset the indicator.

Avoiding these common mistakes will help you perform a successful 2018 Ram 1500 diesel oil change and protect your engine. Taking the time to do it right is the best way to keep your truck running smoothly for years to come.

Conclusion: Keeping Your 2018 Ram 1500 Diesel Running Strong

So there you have it, guys! A comprehensive guide to performing a 2018 Ram 1500 diesel oil change. By following these steps and tips, you can confidently tackle this essential maintenance task yourself, keeping your truck in tip-top shape and saving some cash along the way. Remember, regular oil changes are a cornerstone of proper vehicle maintenance, especially for a powerful diesel engine. Don't underestimate the impact of clean, properly lubricated engine components. Always prioritize safety, refer to your owner's manual, and don't hesitate to seek help from a professional mechanic if you're unsure about any part of the process.

Changing your oil is an act of ownership and care. It's a way of ensuring your truck continues to perform at its best, providing you with years of reliable service and enjoyment. So, grab your tools, get under your Ram, and get that oil changed. You'll be glad you did. Happy wrenching!