Top 8 Best Oil For Cummins 6.7 Reviews in 2022- To Improve Engine Efficiency

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Oil! It might sound like a mere liquid that we come across on a daily basis but it’s the food for all the engines. They survive on this one thing. And just like all the engines, the Cummins 6.7 engine is no exception.

However, any oil won’t do the job. You have to pick the best oil for Cummin 6.7 engines otherwise the engine will soon get worn out.

So, to save you some hassle and to make your life easier we have come up with a list. It consists of the 8 top-graded oil for Cummins 6.7. Hence, you can simply go over the best ones in the market and choose the right one for you.

best oil for cummins 6.7

But that’s not all. We have also added a buying guide at the end to help you out a little. And we even decided to throw in some extra helping points to make you understand what you truly need.

Now, if you are ready we can dive into the main details-

Our Top Picks For Oil: A Quick Overview

In this part, we’ll introduce you to our top 3 picks. In our eyes, they are the show’s stars. But these aren’t all the products that we have for you today. So, do stick around to find out about the rest of them-

Comparison Table






Valvoline ‎Premium Blue VV773780-03 Diesel Engine Oil

  • Brand: Valvoline

  • Model: ‎VV773780-03

  • Viscosity: 15W-40

  • Quantity: 3 Gallons

  • Weight: ‎24 pounds

  • Style: Conventional


Shell Rotella T6 5W-40 Full Synthetic Oil

  • Brand: Shell Rotella T

  • Model: ‎T6

  • Model Number: ‎550045347-3PK

  • Viscosity: 5W-40

  • Quantity: 1 Gallon

  • Weight: 23.5 pounds


Triax Fleet Supreme 10W-30 Full Synthetic Oil

  • Brand: Triax

  • Viscosity: 10W-30

  • Quantity: 5 Gallons

  • Weight: ‎36.3 pounds


Shell Rotella T6 15W-40 Full Synthetic Engine Oil

  • Brand: Shell Rotella

  • Model: ‎T6

  • Model Number: ‎550050467-3PK

  • Viscosity: 15W-40

  • Quantity: 1 Gallon

  • Weight: ‎23.3 pounds


Mobil Super 96819 Motor Oil

  • Brand: ‎Mobil 1

  • Model Number: 96819

  • Viscosity: 15W-40

  • Quantity: 1 Gallon

  • Weight: ‎1 pound


Schaeffer Manufacturing 15W-40 Engine Oil

  • Brand: Schaeffer Manufacturing Co

  • Model Number: 0700CK4-006

  • Viscosity: 15W-40

  • Quantity: 1 Gallon

  • Weight: ‎47.6 pounds


Royal Purple ROY04154 04154 Oil

  • Brand: Royal Purple

  • Model: ‎04154

  • Model Number: ROY04154

  • Viscosity: 15W-40

  • Quantity: 1 Gallon

  • Weight: 1 pound


Cummins 3265336 Onan SAE Oil

  • Brand: Cummins

  • Model Number: 3265336

  • Viscosity: 15W-40

  • Quantity: 0.25 Gallon

  • Weight: 1 pound

01. Valvoline ‎Premium Blue VV773780-03 Diesel Engine Oil

[Editor’s Choice]

Valvoline ‎VV773780-03 Diesel Engine Oil

Product Specifications:

  • Brand: Valvoline
  • Model: ‎VV773780-03
  • Viscosity: 15W-40
  • Vehicle Service Type: Truck
  • Liquid Volume: 3 Gallons
  • Item Weight‎: 24 pounds

The best oil for Cummins 6.7 diesel is Valvoline ‎VV773780-03 Diesel Engine Oil. You see, this oil is conventional oil. And it can work on multiple engines that include diesel, gas, and natural gas.

You see, this oil works perfectly with the Cummins 6.7 engines. In fact, the company Cummins itself recommended using this product. Thus, it works perfectly with these types of engines.

But that’s not all, this oil has pretty great oxidation resistance power. This works to increase the life of your high-powered engine.

Moreover, this oil has high wear protection. Hence, even if you use the oil on a high-powered engine, it won’t let the engine wear out so easily. 

However, it’s designed to ensure protection in emissions equipped diesel engines. Hence, it might not work with the older version of Cummins 6.7 engines.

The Pros:

  • Resists oxidation. Thus, your engine’s life will be prolonged
  • The oil is well formulated. So, it won’t let the engine wear out easily.
  • It is recommended by the Cummins company so you can trust it to be legitimately good for your engine.
  • Works on diesel, gas, and natural gas. Hence, you get a variety of options.

The Cons:

  • Expensive option. So, it might not meet your budget.

02. Shell Rotella T6 5W-40 Full Synthetic Oil

Shell Rotella T6 5W-40

Product Specifications:

  • Brand: Shell Rotella T
  • Model: ‎T6
  • Viscosity: 5w-40
  • Vehicle Service Type: Car
  • Liquid Volume: 1 Gallon
  • Oil Type: Diesel Oil

The runner-up in our eyes is the Shell Rotella T6 Synthetic Oil. This oil has additive technology which we think is the best oil additive for 6.7 Cummins.

You see, this oil has triple protection plus formula. Hence you get great equipment protection and it will prolong your 6.7 Cummins’s life.

Now, which trucks is it built for?

Well, it works on diesel-powered vehicles. So, you can use them from tractors/trailers to classic cars and heavy-duty diesel pickups. But they have to allow the usage of SAE 5W-40.

The Pros:

  • It contains additives. This increase the engine’s life
  • It can resist high pressure. So, it works on heavy-duty trucks.
  • Comes with an advanced formula. This ensures it doesn’t attract dirt or soot.
  • The oil ensures that the engine doesn’t wear easily. Hence, the engine runs for a long time.

The Cons:

  • The oil has a lower viscosity. So, compared to the other oil on the list, this one will evaporate faster at high temperatures.

03. Triax Fleet Supreme 10W-30 Full Synthetic Oil

Triax ‎EO-78VW-3ADR Full Synthetic Oil

Product Specifications:

  • Product Dimensions: 12 x 12 x 15 inches
  • Brand: Triax
  • Viscosity: 10W-30
  • Vehicle Service Type: Diesel Trucks
  • Liquid Volume: 5 Gallons
  • Item Weight: ‎36.3 pounds

In third place, we have the Triax ‎EO-78VW-3ADR Full Synthetic Oil. This oil works on diesel trucks. Thus it is an excellent pair for the 6.7 Cummins engine.

Moreover, this oil is synthetic. In fact, it is one of the best synthetic oil for Cummins 6.7. The engine runs smoothly because of this factor.

Apart from that, the viscosity of this engine is 10W-30. It is a bit lower than what most of the other oil offers but if low viscosity is what you’re looking for then this might be the perfect fit.

On the other hand, the amount of this oil is quite higher than the rest. It comes in a pack of 5 gallons and that is more than enough for your 6.7 Cummins engine. In fact, you can store some for later use.

The Pros:

  • Can tolerate high temperatures of the oil. So, it won’t burn too easily.
  • This oil has turbo-charger protection. Thus the turbo won’t end up burning.
  • It eliminates the need to clean diesel particulate filters. So, you will have ease in cleaning.
  • Comes in a lot of amounts. So, you can buy and store the oil for future use.

The Cons:

  • Has a lower viscosity. So, it evaporates easily at high temperatures.

04. Shell Rotella T6 15W-40 Diesel Engine Oil

Shell Rotella T6 Engine Oil 15W-40

Product Specifications:

  • Brand: Shell Rotella
  • Model: ‎T6
  • Viscosity: 15w-40
  • Vehicle Service Type: Truck
  • Flash Point: 399 Degrees Fahrenheit
  • Amount: 1 Gallon

Another Shell Rotella oil that you can use is Shell Rotella T6 15W-40 Diesel Engine Oil. But the difference is that this one has a higher viscosity. So, it won’t vaporize under high temperatures.

Besides, it is one of the best oil for 2020 Cummins 6.7. One of the reasons for that is it works great at low temperatures as well. You see, it flows quite efficiently at low temperatures.

However, similar to the earlier Shell Rotella oil this one also doesn’t attract soot, dirt, or other contaminants. Hence, the oil doesn’t turn impure.

The Pros:

  • The oil is formulated in an advanced manner.  This prolongs the engine’s life.
  • It doesn’t attract dirt or soot. So, the oil remains pure.
  • It has high viscosity. Hence, the oil vaporization will be lower.

The Cons:

  • This one comes in a pack of 3. So, you might end up with excess oil.

05. Mobil Super 96819 Motor Oil

Mobil Super 96819 Motor Oil

Product Specifications:

  • Brand: ‎Mobil 1
  • Model Number: 96819
  • Viscosity: 15w-40
  • Item Weight: ‎1 pound
  • Liquid Volume: 128 Fluid Ounces

Moving on, we have the Mobil Super 96819 Motor Oil. This one is also a diesel engine oil so it will be the best oil for 2016 Cummins 6.7 engines.

Starting off, it comes with 15W-40 viscosity. Trust me, that’s a pretty high value. And this means the oil will be able to flow even at cold temperatures.

Moreover, it will be able to tolerate high temperatures as well. So, no worries in this part, right?

Apart from that, it comes in a packet of 1 gallon. And that’s the right amount needed.

The Pros:

  • It has a high viscosity. Thus it will flow smoothly at low temperatures.
  • They prolong the life of engines. Thus your engine will last longer.
  • This oil works on high-powered engines. Thus they can be used on trucks.

The Cons:

  • Has low ZDDP on this one. There is an older version with more ZDDP.

06. Schaeffer Manufacturing 15W-40 Engine Oil

Schaeffer Manufacturing 15W-40 Engine Oil

Product Specifications:

  • Brand: Schaeffer Manufacturing Co
  • Model Number: 0700CK4-006
  • Viscosity: 15w-40
  • Item Weight: 47.6 Pounds
  • Liquid Volume: 16384 Fluid Ounces

Next up, we have the Schaeffer Manufacturing 15W-40 Engine Oil. This oil also has a viscosity of 15W-40. This is a pretty high value.

Thus, this oil will be able to flow smoothly at low temperatures. And it will be able to tolerate high temperatures.

Moreover, this oil provides wear protection. Thus, the engine will be protected from any kind of damage.

Plus, it increases the oil economy. Thus, you won’t be wasting oil when using this brand.
Furthermore, it is friction modified with Micron Moly and Penetro. These additives work to improve the life of the engine itself making it one of the best oil for 2014 6.7 cummins.

The Pros:

  • Has a high viscosity. Thus, the oil won’t vaporize easily.
  • You get a lot of oil at once. Good deal.
  • It has a wear protection formula. Hence the engine will be protected.

The Cons:

  • Sometimes the containers don’t obtain the full amount of oil.

07. Royal Purple ROY04154 04154 Oil

Royal Purple ROY04154 04154 Oil

Product Specifications:

  • Brand: Royal Purple
  • Model: ‎04154
  • Viscosity: 15w-40
  • Item Weight: ‎1 pound
  • Liquid Volume: 1 Quart

Another great product that we have is the Royal Purple ROY04154 04154 Oil. This oil provides corrosion protection which makes it one of the best oil for Dodge Cummins 6.7.

In fact, the engine won’t corrode with time because of this product. It will last longer

Plus, this oil contains robust detergents. That helps to remove deposits and maintain engine cleanliness.

Furthermore, it doesn’t let dust or other deposits sit on the oil. Hence, the engine performance is not hampered.

You may also like: Royal Purple Oil Review

The Pros:

  • This oil ensures corrosion protection. Thus, the engine doesn’t corrode.
  • Contain robust detergents. This will  ensure the engine’s cleanliness.
  • Delays the oil drain intervals. Thus, you won’t have to drain it often.

The Cons:

  • It is a bit pricey. So, it might be out of your budget.

08. Cummins 3265336 Onan SAE Oil

Cummins 3265336 Onan SAE Oil

Product Specifications:

  • Brand: Cummins
  • Model Number: 3265336
  • Viscosity: 15w-40
  • Item Weight: 1 pound
  • Liquid Volume: 32 Fluid Ounces

Lastly, we have the Cummins 3265336 Onan SAE Oil. Now, you might think that this one isn’t a great oil because it’s our last product. But, just so you know it is one of the candidates for best engine oil for Cummins 6.7.

Now, one of the reasons for this being on the list is because it supports high-powered engines. Thus, this one will work great with your Cummins 6.7 engine.

Moreover, this one has a high viscosity. Thus, it will be able to handle both high and low temperatures.

The Pros:

  • It has a universal fit. Thus, it will work on a variety of engine models.
  • This oil doesn’t let the engine wear out. Hence, the engine lasts longer.
  • It has high viscosity. Thus the oil won’t evaporate easily.

The Cons:

  • The bottle isn’t ergonomic. You might spill while trying to pour the oil.

Buying Guide: Key For Choosing The Right Oil

Now, amidst all these, you might feel lost. And it is quite normal. You see, when you don’t know exactly what to look for it is totally normal to get a bit baffled. But things change when you have in-depth knowledge.

And that is exactly why we are here. To ensure that you are headed in the right direction we have prepared a list of items that you should look into before buying oil for cummins 6.7.

So, if you are ready, we can start-

The Oil Capacity of The Cummin 6.7:

The first thing to know is the capacity of the cummin 6.7 itself. By knowing this you will have an idea of the amount of oil you will have to buy.

You see, simply going in and buying the oil according to your will can make you spend more than what’s needed. Or you might end up buying less which is also quite bad.

So, how much oil do you need to buy?

Well, all the Cummins models after 2008 have a higher capacity. They are capable of storing 12 quarts of engine oil. On the other hand, the older models can store less oil. Thus, you need to buy oil according to your model. 

The Viscosity of The Oil Itself:

After determining the amount of oil you need you should start looking for some of the factors of oil. Viscosity is one of those factors. But before we discuss this topic you need to understand what viscosity truly is.

Well, it is basically the thickness of the oil. In other words, it is the unit that determines how thick or thin the oil actually is.

Now, when it comes to Cummins 6.7 or any other engine viscosity of the oil needs to be of the right level. It shouldn’t be too thin and neither should be too thin.

You need to be aware of the right viscosity when you buy the oil. So, when purchasing the oil you need to look at the viscosity level. Now, if you see something like 10W-30 on the product you can say that it’s viscosity.

And, what does this mean?

Well, the 10 stands for fluid resistance at 0°F. Whereas, 30 represents resistance to high temp thinning. Besides this, you should also be aware that viscosity is affected by temperature. Oil gets thin on hot days and thick on cold days.

Oil Type: 3 Types of Oil

Generally, for engines, there are 3 types of options present. They are synthetic oil, semi-synthetic oil, and conventional oil. However, the best engine oils for Cummins 6.7 are synthetic oil and conventional oil.

Now, the synthetic oil that is made for Cummins 6.7 happens to organic oil blended in it. It’s basically like every other synthetic oil but it has a bit of organic touch to it. Thus, these types of oils work for high-tech engines.

On the other hand, we have conventional oil. Now, as its name suggests, it is used for older engines. But it does work on a few of the latest models of Cummins engines. However, we do advise you to check for compatibility.

Specific Recommendations:

Lastly, focus on the recommendations that come with each engine. Some of your Cummins engine manufacturers will tell you what oil to opt for.

So, do take them into account. And it’s best to stick to those oils as they are the most compatible oil for your Cummins engine.

Performance Table

PRODUCTViscosityLongevityWear Protection High-Temperature Tolerance
Valvoline ‎VV773780-03 Diesel Engine Oil9.
Shell Rotella T6 5W-40 Full Synthetic Oil89.89.98
Triax ‎EO-78VW-3ADR Full Synthetic Oil99.79.79
Shell Rotella T6 15W-40 Diesel Engine Oil9.
Mobil Super 96819 Motor Oil9.
Schaeffer Manufacturing 15W-40 Engine Oil9.
Royal Purple ROY04154 04154 Oil9.99.499.7
Cummins 3265336 Onan SAE Oil9.99.399.6

Types of Oil for 6.7 Cummins: 4 Types

Now, if we classify all the oil for Cummins 7.6 engine we can divide them into 4 categories. And it is best to know about them before you go on to decide the best oil for yourself.

Here they are-

Synthetic Oil:

As you might understand from the name, synthetic oil is completely artificially made. That’s why they generally tend to cost more. But they can work well with engines that go under constant stains like the pickup trucks.

This is because they are able to withstand that extra strain on a molecular level. Plus, they work great with modern engines and can withstand both high temperature and pressure

High-Mileage Engine Oil:

The high-mileage oil is best for the older versions of Cummins 6.7 engines. You see, this type of oil composes the standard base oils.

But it also includes additives like conditioning agents and oxidation preventatives. It softens the seals of the engines and makes them work properly.

Conventional Oil:

Another oil that works for the Cummins 6.7 is conventional oil. But they are more suited for the older engine.

However, we do not highly recommend this type of oil. That is because it slowly damages the engine. Although, it won’t be noticeable at first the damage will be there.

High Viscosity Oil:

One more option is the high viscosity oil. This type of oil has a high viscosity level. So, you will be seeing something like 15W-30. The higher the value the more viscosity the oil has.

Anyway, we recommend going with oil that has a higher viscosity. This is simply because they ensure that your engine will function better.

How to Change Oil on 6.7 Cummins?

Wanna learn how to change oil for Cummin 6.7 engines? Well, it’s super easy. This is all that you have to do-

Step 1: Let The Oil Out

Firstly, use a racket to break the oil plug seal and drain oil into a drain pan.

Step 2: Put The Plug Back

Once the oil is drained, put the drain plug back to its original place.

Step 3: Remove Oil Filter

Later on, use a filter wrench to filter to break loose the oil filter. Then place the oil filter underneath and take off the oil filter.

Step 4: Change the filter

After that, replace the oil filter. While doing so, make sure some of your new oil is still on your oil filter.

Step 5: Add oil into the engine

Moving on, pour 12 quarts of oil into your engine.

Step 6: Check For Leakage

Lastly, start the engine to check for leaks.

What Is The Best Oil Filter for 6.7 Cummins?

One thing that you should buy along with oil for your Cummins 6.7 is the oil filter. They are quite helpful for the engine. This is because they work to remove debris, rust, and metal particles.

Thus, your engine tends to work smoothly and doesn’t wear over time. Now, you might be asking which one I should buy. Well, here are our recommendations for the oil filters-

Fleetguard LF16035 Stratapore Oil Filter:

Firstly, we have the Fleetguard LF16035 Stratapore Oil Filter. This filter is approved by the Cummins company itself. It is durable and has low filter restrictions.

Moreover, this oil filter also has a fluted shell. That makes it easy to filter. Besides, it works great on RM trucks.

WIX Filters 57620XP Spin-On Lube:

Moving on we have the WIX Filters 57620XP Spin-On Lube. This works great with synthetic motor oil. Plus, nothing will happen to this filter even when it is exposed to harsh road conditions.

Hence, you can take your car or truck on the driveway and this filter will still work. Moreover, this filter can also withstand the high temperature of the oil

Have Any Questions?

Is there any suitable 6.7 Cummins oil change interval that I can use?

The suitable interval for 6.7 Cummins oil depends on the type of oil you are working with. For synthetic oils, change them every 5000 miles or 8000 km. On the other hand, for conventional oil, change it for every 3700 miles or 6000 km.

What oil does Cummins 6.7 recommend for me?

The Cummins company directly recommends two Valvoline oils for its engines. This includes the 15W-40 and the 5W-40. The first one works for any temperature higher than 0 degrees Fahrenheit while the other one is best for cold weather.

How should I know how many hours is a 6.7 Cummins good for?

The 6.7 Cummins engine works well for 20,000 hours. However, this solely depends on the maintenance of the engine itself. You need to take good care of the engine in order to make it run that long.

How long should I let Cummins warm up?

To ensure the safety of the oil you should warm up the engine for 1-2 minutes and then drive it slowly for 3-4 blocks and let the coolant get to about 140 degrees.

In Short

Well, that’s about all we had on the best oil for Cummins 6.7 engines. So, by now we hope you do have a choice. However, if you’re still confused then you can always go with our top pick.

You know, it’s the best for a reason. Anyway, this is our stop for the day. We hope to see you again on another fine day. Stay safe. Adios!


Valvoline ‎VV773780-03 Engine Oil

Valvoline ‎VV773780-03 Diesel Engine Oil

Now, every single oil works well for the Cummins 6.7 engines. But the most suitable one is the Valvoline ‎VV773780-03 Diesel Engine Oil. You can be sure of that because Cummins has elected this one to be the best pair for the Cummins engines. 

Apart from that, the oil is formulated to ensure the long life of the engines. So, your engine will be under the best care because of this oil.

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