The 2018 Ram 5500 6.7L is among the largest Ram vehicles. To keep this big, powerful truck running smoothly, you’ll need to periodically change its oil—which begins with learning about its engine oil capacity.

A 2018 Ram 5500 is a large, capable truck with an equally large and capable engine. Whether you’re using your truck for off-road adventures or for tasks like hauling lumber, you’ll need to keep its engine in tip-top shape. Before you roll up your sleeves and take a stab at changing the oil yourself, you need to learn how much oil your engine needs and what kind to buy.

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2018 Ram 5500 6.7 Engine Oil Capacity

A 2018 Ram 5500 6.7L has an engine oil capacity of 12 quarts. During a routine oil change, you will need to purchase 12 quarts or 11.4 liters of motor oil.

MORE: How much should an oil change cost?

What kind of oil does a 2018 Ram 5500 6.7 need?

But, don’t just grab 12 quarts of the first motor oil you see on sale! Specific motor oils are engineered to work in different engines—and using the wrong kind could damage your truck. For the 2018 Ram 5500 6.7L, Dodge recommends that you use SAE 5W-40 synthetic oil.

If you’re not familiar with oil types, here’s what you should know. SAE stands for “Society of Automotive Engineers,” which regulates and codes oil types. The two numbers indicate the oil’s viscosity, or thickness, at different temperatures.

The “W” stands for winter, and the 5 next to it indicates that this specific grade of oil will flow well in 0°F temperatures. The 40 at the end indicates that the oil will maintain a suitable viscosity even at your engine’s ultra-hot operating temperature of 212°F.

Dodge suggests that you use synthetic, as opposed to natural or detergent, oil for the 2018 Ram 5500 6.7, as synthetic oil tends to be more long-lasting and efficient for diesel engines.

Not sure where to begin shopping? Here are our top three picks of motor oil for the 2018 Ram 5500 6.7:

Ravenol 5W-40 Heavy Duty Fully Synthetic Motor Oil

Valvoline Premium Blue Extreme 5W-40 Fully Synthetic Diesel Engine Oil

Pennzoil Platinum Full Synthetic 5W-40 Motor Oil

Pro tip When purchasing motor oil, take a look at how much is in each bottle to make sure you’re buying enough for your oil change.

How often to change oil on a 2018 Ram 5500 6.7

Now that you know what kind and how much motor oil to purchase, you need to know when to change your oil. You should change your 2018 Ram 5500 6.7’s oil every 3,700 miles. But, you should check your oil at regular intervals like once a month or after every other refuel.

Sometimes, you will need to get your oil changed a little ahead of schedule. Keep an eye—and an ear, and a nose—out for the following signs that there’s an issue with your engine oil:

Motor oil that needs changing is dark brown or black (Clean oil is light brown or amber, like a cup of tea. Dirty oil is like a cup of soda.)

Motor oil feels coarse or gritty like it’s been mixed with sand

Strange new

noises

coming from the engine while driving

New smells, especially anything that smells like oil, smoke, or burning

Changes in your vehicle’s performance

MORE:

Dodge tune-up cost

How to change your oil and oil filter

If you’re due for a routine oil change and want to try tackling it yourself, you’ll first need the following

essential car tools and supplies

at the ready:

Socket wrench

Filter wrench

Drain bucket

Replacement oil filter

12 quarts of SAE 5W-40 engine oil

Allow your truck to warm up to its normal operating temperature by letting it run for about five minutes. Once it’s warmed up, turn off your engine and complete the following steps:

Open the hood

and remove the oil fill cap

Under your truck, position the drain bucket underneath the drain bolt. Use your socket wrench to remove the drain bolt and allow the old oil to drain into the bucket for about 10 to 15 minutes

With your filter wrench, remove the old oil filter and continue to let the old oil drain into the bucket

Screw on the new filter

Replace the old drain bolt

Refill the engine with new oil and replace the oil fill cap

Run your engine for a couple of minutes to check for any leaks

Last step: clean up! Do not just dump your oil, dirty oil down any drain, or throw it in the garbage. You will need to place it in a sealed container and bring it to your local recycling center for proper disposal.

MORE:

Ultimate FRAM oil filter guide

Don’t forget regular insurance policy maintenance

If you regularly change your car’s oil, why not regularly shop for car insurance as well? If the answer is “I don’t have time to do it,” then download

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