How to Change Oil on Your Ram 2500/3500

Getting Started with Your Oil Change

Changing the oil on your Ram 2500/3500 is a maintenance task you can do yourself with basic tools and supplies. This guide walks you through the process step by step so you understand what's involved in keeping your truck's engine running smoothly.

Before you begin, gather what you need:

• New oil (check your owner's manual for the correct type and amount)
• New oil filter
• Oil drain pan
• Wrench or socket set
• Oil filter wrench
• Jack and jack stands (if needed for clearance)
• Ramps (optional alternative to jack stands)
• Funnel
• Shop towels or rags
• Safety glasses
• Work gloves

Having all these items ready before you start makes the process smoother and safer. Most of these tools are inexpensive and can be found at any auto parts store or hardware store.

Key Takeaways

• Gather all necessary tools and materials before starting your oil change
• Always work on a level surface with proper support—never rely on a jack alone
• Warm oil drains better than cold oil, but allow time for it to cool enough to handle safely
• Don't over-tighten the drain plug or oil filter—hand-tight plus a small amount of wrench pressure is sufficient
• Check your owner's manual for the correct oil type, capacity, and recommended change interval for your specific truck
• Always dispose of used oil at a proper recycling facility, never down a drain

Prepare Your Truck

Park your Ram on a level surface where you have room to work underneath. If you need more clearance under the truck, use a jack and jack stands or drive onto ramps. This is an important safety step—never work under a truck supported only by a jack.

Let the engine run for a few minutes to warm up the oil, then turn it off. Wait about five to ten minutes for the oil to cool slightly. Warm oil flows and drains better than cold oil, but you want to avoid burns from oil that's too hot to touch safely.

Put on your safety glasses and work gloves before you slide under the truck. These protect your eyes from drips and your hands from sharp edges and hot surfaces.

Locate and Remove the Drain Plug

Slide under the truck and look at the bottom of the engine pan. The oil drain plug is usually a bolt that sticks down from the pan. On Ram 2500/3500 trucks, you'll typically find it toward the rear of the pan.

Position your drain pan directly underneath the plug to catch the old oil. Use your wrench to loosen the plug by turning it counterclockwise. Once it's loose enough to turn by hand, carefully unscrew it the rest of the way. Be prepared for oil to flow out—it may still be warm.

Let the old oil drain completely into the pan. This process usually takes several minutes. While you're waiting, you can prepare the new oil filter or organize your other supplies.

Once the oil stops dripping, wipe the drain plug clean with a shop towel. Inspect the rubber washer on the plug. If it looks damaged or worn, consider replacing it. Screw the plug back in by hand first to avoid cross-threading, then tighten it with your wrench. Snug is the right amount of pressure—over-tightening can strip the threads or crack the pan.

Replace the Oil Filter

Find the oil filter on your Ram. On 2500/3500 trucks, it's typically located on the side of the engine block. Consult your owner's manual if you're having trouble locating it.

Position your drain pan underneath the filter to catch any oil that spills when you remove it. Use an oil filter wrench to loosen the filter by turning it counterclockwise. Once it's loose enough, unscrew it by hand and let any remaining oil drain into the pan.

Wipe the filter mounting surface clean with a shop towel. Remove any old rubber gasket material or debris. This surface must be clean for the new filter to seal properly.

Take your new filter and apply a thin layer of new oil to the rubber gasket (the flexible ring) on top of the filter. This helps create a better seal. Screw the new filter onto the mounting surface by hand. Once the gasket touches the mounting surface, turn the filter an additional three-quarter turn. This is enough to seal it properly without over-tightening, which can damage the gasket or make removal difficult next time.

Add New Oil

Lower your truck back to the ground if you raised it using a jack and stands. Make sure it's stable and level before you proceed.

Open the hood and locate the oil filler cap on top of the engine. It usually has an oil can symbol on it. Unscrew and remove the cap.

Place a funnel in the opening to prevent spills. Pour in the recommended amount of new oil. Check your owner's manual for the exact amount—Ram 2500/3500 trucks typically need between 11 and 15 quarts, depending on the engine size and whether you're also replacing the filter.

Once you've added the oil, replace the oil filler cap and screw it on firmly so it doesn't come loose while the engine runs.

Check Your Work

Start the engine and let it run for about 30 seconds. This circulates the new oil through the engine and the new filter. You should see the oil pressure light go out, which means oil is reaching all parts of the engine.

Turn off the engine and wait a few minutes for the oil to settle. Pull out the dipstick (or use your truck's electronic oil level system if it has one), wipe it clean with a shop towel, reinsert it fully, and pull it out again to check the level. The oil should be at or near the full mark.

If the level is low, add a small amount more oil and recheck. If it's overfull, drain a small amount carefully. Getting the level right is important for proper engine function.

Dispose of Old Oil Properly

Never pour old oil down a drain, into the ground, or into the trash. Used oil is harmful to the environment and illegal to dispose of improperly in most places.

Take your drain pan to a local auto parts store, service station, quick-lube shop, or recycling center. Most of these locations accept used oil for free, and many will also take used oil filters. Some may even give you a small credit toward your next purchase.

Frequently Asked Questions

How often should I change the oil in my Ram 2500/3500?

The recommended oil change interval depends on your truck's engine type and year. Many newer Ram trucks can go 10,000 miles between oil changes, while older models may need changes every 5,000 miles. Always check your owner's manual for the specific interval for your truck. Some manufacturers also recommend more frequent changes if you do a lot of towing, driving in dusty conditions, or short trips.

What type of oil should I use in my Ram 2500/3500?

The correct oil type and viscosity (thickness) for your Ram depends on your specific engine and climate. Your owner's manual will specify whether you need 5W-30, 10W-30, or another grade. Using the wrong oil can affect engine performance and longevity. If you're unsure, ask at an auto parts store with your truck's year, make, and engine size, and they can help you find the right product.

Can I reuse the old oil drain pan for other purposes?

Once you've used a drain pan for old oil, it's best to keep it dedicated to that purpose. Oil residue can be difficult to remove completely, and you don't want to contaminate other materials or surfaces. Label it clearly as an oil drain pan so it doesn't get used for anything else.

What should I do if I accidentally overfill the oil?

If you add too much oil, you'll need to drain the excess. The easiest way is to loosen the drain plug slightly and let a small amount of oil flow out into your drain pan until the level is correct. Check the level frequently as you do this so you don't drain too much. Overfilled oil can cause problems with engine seals and performance.

Do I need to replace the drain plug washer every time I change the oil?

The drain plug washer doesn't always need replacing, but inspecting it is a good idea. If it looks cracked, flattened, or damaged, replace it. A worn washer can lead to leaks. Replacement washers are inexpensive and can be found at any auto parts store.