How Much Oil Does A 6.7 Cummins Take: Overall Need

A persistent question of many Dodge users is, “how much oil does a 6.7 Cummins take?” This is one of the most reliable truck engines, which has a high engine oil consumption.

To incorporate the right amount of engine oil, we mention all the necessary information below.

We also mention the correct procedure for pouring engine oil into this engine. We even answer some frequently asked questions, so it is highly recommended to read on.

How Much Oil Does A 6.7 Cummins Take: A Clear Concept

When we are talking about a Cummins 6.7 L engine, it is a large vehicle usually used for various heavy-duty jobs.

That is why we will find some typical features of large vehicles, such as an engine oil capacity of 3 gallons or 12 quarts.

Most vehicles that use this engine require this amount of engine oil capacity.

Once it is time to refill the engine oil in the vehicle, the total may vary depending on the oil used and the condition or mileage of the vehicle.

When it comes to a Cummins 6.7 L engine, it is also essential to consider that it is a vehicle that has a high oil consumption.

The oil consumption values are so important, and it is the same with the vehicle’s fuel economy. The year of manufacture is essential as the modifications made to the vehicle.

Even the vehicle’s weight is another critical factor that many users want to consider. This vehicle has a fuel tank capacity of 32 gallons in most cases.

So, we can count on a fuel economy of 12 miles per gallon in the city.

What do You Need to Know?

When it comes to the highway, the user gets 18 miles per gallon. On a combined city and highway trip, the fuel economy is 15 miles per gallon.

As mentioned, fuel economy can vary depending on the workload the vehicle is subjected to.

When this vehicle is used to haul or tow additional cargo, fuel economy is affected. Even some problems within the vehicle’s mechanics can lead to a deterioration of fuel economy.

Oil consumption is often related to the time intervals between oil changes.

Experts recommend replacing the Cummins 6 7 L engine oil every 15,000 miles driven or every 12 months.

Respecting these intervals can be very important since engine oil decreases friction between moving parts and temperature. It is also highly recommended to have a fully synthetic engine oil.

The Official Description

The RAM manufacturer indicates that when it comes to a Cummins 6 7 L, the engine’s service life is one of the most positive aspects.

Some users consider the useful life of this engine to be 250,000 miles, and other users and the manufacturer indicate that the useful life is 350,000 miles.

To this end, it is essential to consider different factors involved in practical life.

To increase the probability of a 350,000 miles useful life, it is necessary to consider some fundamental aspects.

Achieving this life is possible by avoiding factory engine performance modifications, and it is also imperative to apply scheduled maintenance and services to the vehicle.

Respecting these times for maintenance, oil, and oil filter replacement and replacement of other filters and parts is essential to achieve this service life.

According to Users

Many users have the possibility of exceeding 350,000 miles of engine life before mechanical failures or malfunctions begin to appear.

Additionally, drivers of this vehicle must also consider responsible and efficient use of the vehicle on any road or highway.

After 100,000 miles, different factors become more critical before the appearance of various mechanical failures or malfunctions.

In this case, we can mention that the driving habits or the weather become more critical factors that quickly wear out the engine’s useful life.

That is why many people recommend different factors that take care of the Cummins 6 7 L. One of these factors is incorporating synthetic oils that adapt to the user’s climate.

6.7 Cummins Oil Filter Part Number

When it comes to replacing the vehicle’s oil filter, this part has a number that must be respected. Usually, this is the oil filter with the serial number 05083285AA, and this part number is MO285.

Efficiently replacing the oil filter with this number is one of the most critical steps for complete maintenance.

This is a significant number because the different parts that are marketed for engines and vehicles, in general, have a specific design.

The Cummins 6 7 L engine is no exception, and this engine’s oil filter part number can also be checked by reading the vehicle owner’s manual.

Fitting an oil filter with a different part number can lead to short- or long-term problems.

This part is one of the fundamental parts for the correct functioning of the oil and the engine’s lubrication. Incorporating an incorrect oil filter can accelerate this part’s deterioration.

In addition, an incorrect oil filter can also damage the new oil incorporated in the oil change.

Some of the inconveniences that can occur due to an incorrect oil filter are the increase of excessive temperature or a lack of lubrication between the moving and internal parts of the engine.

How to Pour Oil on 6.7 Cummins

Pouring oil in a Cummins 6.7 L diesel engine is not very different from the oil and oil filter change usually performed in other vehicles with other engines.

That is why here we mention some quick and straightforward steps that any user can perform without the need for specific knowledge or tools.

Starting the engine

Some people mistake replacing the oil and oil filter when the engine is completely cold. This task can be complicated because the oil inside the vehicle is not at the right temperature.

So, it is necessary to start the oil change procedure by starting the vehicle.

Once the vehicle is started, it is necessary to wait between 10 and 15 minutes. In this way, both the engine and the engine oil inside the vehicle will reach the desired and average temperatures.

In addition, this will allow the engine oil to reach the desired consistency so that it can be removed more easily in replacing all the engine oil.

Draining the oil

According to experts, it is advisable to drain all the old oil inside the vehicle to add new engine oil. Some people may decide to add only motor oil and mix it with the old motor oil.

However, this can be a wrong decision, as it only impairs the performance of the new engine oil.

To do this, a container should be placed underneath to allow all the engine oil to drain. Once the container is in place, the user needs to remove the air filter cover.

Using the appropriate wrench, the person should continue to remove the oil filter. Both the oil filter and the old engine oil can be recycled in the appropriate places to avoid contamination.

Pouring in the new oil

When dealing with a Cummins 6 7 L diesel engine, the user needs to incorporate diesel-specific engine oil. Once all the old engine oil has been drained, it is possible to incorporate it.

Each user should have 12 quarts of engine oil since this is the capacity of the Cummins 6 7 L.

Many people choose to use fully synthetic engine oil, even though this is more expensive than blended engine oil.

Precisely this is due to the additives and superior cleanliness level that this type of engine oil can offer.

It is also necessary to consider the viscosity grade of the motor oil according to the climatic conditions and ambient temperatures.

FAQs on How Much Oil Does A 6.7 Cummins Take

How much engine oil does the Cummins 6.7 require?

Every user needs to know the amount of oil that his vehicle requires because it is one of the most critical components for the correct functioning of the engine.

When we talk about the Cummins 6.7 L engine, we refer to an engine with a capacity of 3 gallons. Knowing this aspect will allow you to incorporate the right amount of oil.

However, it is also necessary to consider the amount of oil consumed by a vehicle such as the RAM 3,500 6.7 L Cummins diesel truck.

In this case, we are talking about 3 gallons when the driver uses SAE 5W-40 motor oil, and this oil is the most suitable when the driver uses his vehicle with temperatures below 0°F.

The engine oil consumption is the same as when it is the same engine from 2018 or even 2019.

So, the fuel consumption is always the same because the engine oil capacity has been kept at 3 gallons.

When the driver uses his vehicle with temperatures above 0 °F, he requires 15W-40 engine oil.

What oil should I buy for Cummins 6.7 l?

Today, there is a wide variety of engine oils that it is possible to choose from for the proper operation of a Dodge RAM with Cummins 6.7 L engine.

Not only is there a wide variety of brands, but the three main types of oil should be considered. Among them are mixed oil and fully synthetic oil.

Among the most recommended options, fully synthetic oil is the most expensive, although also the most recommended.

This is mainly due to the wide variety of additives incorporated into fully synthetic oil.

Among the main functions of the additives, we can mention the greater cleaning capacity for the internal parts of the engine.

Some of the options that users frequently choose include Valvoline Premium Blue Extreme full synthetic oil.

This oil not only meets each of the necessary specifications and quality standards but also respects the Cummins CES 20,081 specifications. This way, the driver can count on more reliable driving.

What grade of motor oil do I need for Cummins 6.7 L?

When a person drives a vehicle like the RAM 3500 diesel, he or she must consider different aspects such as climatic factors and ambient temperatures.

The grade of motor oil is essential because of the viscosity grade or thinness that each oil can acquire about the ambient temperature.

Many people often choose 5W-40 as a suitable viscosity grade for this vehicle. In this case, it is a motor oil with the proper cold viscosity that remains thin.

At the same time, this viscosity grade is still higher compared to a hot temperature.

When there are high temperatures, this motor oil can offer precisely the viscosity of the 15W-40 motor oil.

So, when it comes to a vehicle that is used with changing temperatures between a low and a high level, 5W-40 motor oil can be efficient.

What is the correct oil change frequency for Cummins 6.7?

A vehicle with a Cummins 6 7 L engine, such as a Dodge RAM 3500 diesel, requires an oil change with a specific frequency.

All this can be seen in the vehicle’s owner’s manual, although the most recommended is 3700 miles or 6000 km.

This interval should be the most suitable for safe and reliable use of the engine. Also, users usually choose a 5W-40 or 15W-40 motor oil, either of the two being efficient.

How often should the fuel filter for Cummins 6.7 L be replaced?

Each of the parts of a vehicle has a certain lifespan, and this is no exception for fuel filters and each of the parts related to that.

Many experts recommend 12 months or 15,000 miles to replace these filters.

The serpentine drive belt should also be replaced at a 100,000-mile interval. These replacements can be done on time to avoid different mechanical inconveniences.

A vehicle with this engine can also perform better when the user waits for it to reach the proper temperature.


Here we have answered the question, “How much oil does a 6.7 Cummins take? In this way, both novice and experienced users can completely understand their vehicles.

One of the most important aspects of a Cummins 6.7 L is the care and maintenance provided by the user.

That is why it is recommended to respect the intervals of an oil change, oil filter, and all the parts that need to be replaced from time to time.

All this will reduce the annual costs of repairs and other inconveniences.