5 Best Oils For Cummins 6.7 Reviews

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Choosing the correct type of oil for your vehicle can be a daunting task.

It doesn’t matter how much experience you are on the automotive side; there is a high probability that you will choose a product that will hurt the engine more than it can do good.

Many proud owners of vehicles with the Cummins 6.7 have gone through this exact scenario in the past.

That is why I have compiled a list of the best oils for Cummins 6.7 with an included buying guide.

This article will help you in finalizing your decision of choosing the right one for your engine. In addition, you will experience a better driving experience with these six products.

So, without any further ado, let’s get straight into it!

5 Top Rated Motor Oils For 6.7 Cummins Comparisons

Valvoline Premium Blue SAE Diesel Engine Oil

Valvoline Premium Blue SAE Diesel Engine Oil

Shell Rotella T6 Full Synthetic Engine Oil

Shell Rotella T6 Full Synthetic Engine Oil

Amsoil SAE 15W-40 Heavy Duty Diesel And Marine Motor Oil

Amsoil SAE 15W-40 Heavy Duty Diesel And Marine Motor Oil

Triax Fleet Supreme 10W-30 Full Synthetic Oil

Triax Fleet Supreme 10W-30 Full Synthetic Oil

Shell Rotella T4 Triple Protection Conventional Oil

Shell Rotella T4 Triple Protection Conventional Oil


1. Valvoline Premium Blue SAE Diesel Engine Oil

Valvoline Premium Blue SAE Diesel Engine Oil
$74.60 ($0.19 / Fl Oz)
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11/10/2023 03:48 am GMT

Things don’t get better than this superb premium oil by the brand Valvoline. I have checked out the brand’s products before, and let me tell you; they are one of the leaders in the category.

Their oil has been designed and engineered to be superior to the competition in every single manner.

If you don’t take me at my word, I get it, but you can’t deny the close to 500 solid five-star ratings received by this product.

The Valvoline Premium Blue is an oil that Cummins itself endorses.

That is a pretty big deal because it states that the engine manufacturer trusts this specific product more than anything on the market.

And who would know better than the one who designed your engine itself?

Talking about performance benefits, you get all the goodies you would expect from high-end oil.

The Dispersive Polymer Technology, more commonly known as DPT, is the best in class when controlling soot.

The same technology also protects the engine from cold start issues. One thing that all engines are prone to be deposit formation.

These deposits normally form in the pipelines, which then restricts the oil flow, hence not allowing the engine to work at its full capacity.

This Valvoline product solves that problem too. Moreover, the oil has been tested extensively in Cummins engine to ensure it is perfect for everyday use.

It has even been tested in EGR engines that circulate exhaust gases.

Guess what?

It works perfectly and flawlessly in all of them.

As expected with a first position product, this one has absolutely no drawbacks. Buyers didn’t notice any issues from product quality to shipping.
  • DPT technology
  • Endorsed by Cummins
  • Prevents deposit formation
  • Extensively tested
  • Expensive

If you are in the market for high-performing oil, nothing can beat Valvoline’s Premium Blue. They may be better in one or two regards, but this one is far more reliable and superior.

2. Shell Rotella T6 Full Synthetic Engine Oil

Shell Rotella T6 Full Synthetic Engine Oil
$70.41 ($0.18 / Fl Oz)
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11/10/2023 02:13 am GMT

Earning the second spot on this list is a product from a highly regarded brand, Shell. They make high-quality products that have won the hearts of many consumers worldwide.

That includes the more than 6000 people who rated this T6 Full Synthetic Engine Oil a solid five stars. An oil change will rarely grant you improved fuel economy.

Well, Shell is one of those companies that is part of that rare league. With the T6, they promise a 1.5% improved fuel efficiency.

I know that it is not a huge difference, but it’s still better than nothing. This percentage has been found out when compared to all SAE 15W-40 SAE oils.

I have detailed some information in the buying guide at the end of this article for those who don’t know.

The oil uses a Tripe Protection Plus formula which uses all combined synthetic oils with Shell’s additives to prolong the engine’s life.

You can expect a noticeably longer lifespan with this oil flowing through your engine. Furthermore, the same additives also reduce the effect of contaminants such as dirt and soot.

They can reduce the performance of the oil and reduce its lifespan. You don’t have to worry about that anymore. That does not mean that you don’t have to care about this stuff anymore.

It helps in unforeseen circumstances, when, for example, you have to drive your Ram truck in dusty conditions.

This product also resists loss in viscosity which is one of the most common problems that plague products from several brands.

The pressure is also maintained when the engine is being overworked. This ensures your engine will produce all horsepower and will not leave performance on the table.

A few buyers reported that the bottles they received were leaking.

Naturally, this is a major inconvenience for anyone, and it is difficult to get a refund or a new product due to this issue. Therefore, the shell has to step up its shipping game.

  • Triple Protection Plus Formula
  • Reduced effects of contaminants
  • Resists viscosity loss
  • 1.5% improved fuel efficiency
  • Leaking when arrived

Apart from occasional shipping issues, Shell has created an outstanding product that surely deserves a spot on this article.

3. Amsoil SAE 15W-40 Heavy Duty Diesel And Marine Motor Oil

Amsoil SAE 15W-40 Heavy Duty Diesel And Marine Motor Oil

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Amsoil is an oil brand that has never crossed my eyes before. But when it did, while writing this article, it certainly left a positive impression.

That said, earning third place is the Amsoil SAE 15W-40 Motor Oil with some pretty nifty features that you surely will love.

Unlike the first two oils, which were designed and tested specifically for the Cummins, Amsoil has been developed for use on a variety of diesel engines.

In addition, the brand advertises that their product is perfect for use in on-road and off-road applications.

For off-roading, you need some pretty good additives that will reduce the effects of soot and dust.

The company has used their in-house ones, which make sure that contaminants will have minimal effect on the engine’s lifespan.

The oil also helps in extending drain intervals. This is an excellent feature that allows a person to use the oil for a longer period than 5000 miles.

The misconception that a vehicle’s oil has to be changed after this distance is a thing of the past. Current gen oils can last from 10000 and up to 20000 miles.

And brands like Amsoil are the leaders in this category. Because this one is not that volatile, the consumption and emissions are both minimized.

So you are not only saving oil but are contributing less to air pollution. I don’t know about you, but I feel that there is a certain peace of mind about that.

It can also handle extreme temperatures. When the environment gets cold, the oil can work at temperatures as low as -44 degrees Fahrenheit.

Buyers were mostly satisfied with this product. They had no complaints and would recommend people to buy it for their vehicles with the Cummins 6.7L engine.
  • Reduces effects of soot
  • Reduced emissions
  • Extended drain intervals
  • Perfect for on-road and off-road applications
  • None

This product by Amsoil is an excellent product that is guaranteed to give you a decent performance boost over your previous oil, no matter which brand it is from.

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

Triax Fleet Supreme 10W-30 Full Synthetic Oil
We earn a commission if you click this link and make a purchase at no additional cost to you.
11/10/2023 08:13 am GMT

If you are looking for oil that focuses on improving your fuel efficiency; the most probable chance is that you have not heard of this brand before, but what they are offering is almost too good to be true.

Let’s take a deeper dive into this one!

This Triax Fleet Supreme 10W-30 Full Synthetic Oil is compatible with all sorts of diesel engines on the market.

So whether it’s a Cummins engine or not this one will work perfectly with it.

But here, in this article, we will be focusing solely on Cummins 6.7 and how the product performs concerning it.

The brand advertises a 25000-mile drain interval. That is seriously impressive. It is also the longest out of any of the oils I have ever checked.

This means that you can get a year or even more, depending on individual usage, with one refill.

Another thing the company claims is that their product has 65% less friction than standard requirements.

If this is true, they have gone above and beyond to provide users with an optimal driving experience.

The detergents used in this product guarantee ensure that no deposit will form in the engine’s pipelines.

This makes sure that your engine will have outstanding performance at all times. It won’t throttle at all.

It also helps in reducing oxidation or rusting. That means the engine life will be greatly extended.

Unfortunately, rusting also contaminates the oil itself, which reduces its effectiveness. But, of course, you won’t have to worry about that anymore too.

It can also work at exceedingly low temperatures as low as -40 degrees Fahrenheit.

The only drawback of this one is that it does not have enough ratings.

This means that the company’s claims have not been tested by everyday users, which makes the buy a risk.

  • More than 2% fuel economy
  • No deposit formation
  • 25000-mile drain interval
  • 65% reduced friction coefficient
  • Less rating

Unless more people buy this oil, it is a clear risk to buy it.

I am saying this because the brand’s offerings go head to head with other competitors and even exceed their products in some regard.

5. Shell Rotella T4 Triple Protection Conventional Oil

Shell Rotella T4 Triple Protection Conventional Oil
$42.41 ($14.14 / Count)
We earn a commission if you click this link and make a purchase at no additional cost to you.
11/10/2023 02:03 am GMT

Coming in the last place is another product from the brand Shell. The fact that the brand could take two spots on this highly competitive article means that they know what they are doing.

This Shell Rotella T4 Conventional Oil is focused on cleaning itself and the engine as clean as possible. Its design ensures that the chance of deposit formation is as less as possible.

This makes sure that the engine is clean over its oil drain interval.

The low-ash formulation is another excellent technology that reduces the effect of small particles which may escape from the filter.

It also makes sure that the engine will have as reduced emissions as possible. Moreover, the company has tested this product more than any other product on this list.

It has been tested in real life with millions of miles, which means that this product has been through all necessary tests.

You also don’t have to worry about the engine oxidizing, which is another common issue that presents itself in the long term and not only contaminates the oil but shortens the lifespan of the engine itself.

This one reduces the risk of that too. In addition, the rust protection has been bumped up by 50% compared to the previous generation Rotella T4 oil.

The oil has also been designed to resist breakdown in extreme temperatures. This is the most common problem which is faced by people who use their trucks for heavy-duty tasks.

It has an average of 50% more wear resistance for the engine than the recommended requirement.

Buyers complained that the package they received was leaking. The shipping team at Shell needs to fix this issue because it was also the case with the T6.
  • Reduced chance of deposit formation
  • Works in extreme temperatures
  • Tested in real life
  • Excellent rust protection
  • Leaking when arrived

If Shell solves their shipping issues, this product should be on your list of considerations as it is an excellent performer and better than hundreds of products on the market.

Frequently Asked Questions

Q1. How Much Oil Does A 6.7 Cummins Take?

A Ram truck manufactured from 2007 to 2017 with a 6.7 Cummins engine needs twelve quarts of oil when refilling. This must be known by all vehicle owners, enthusiasts or not.

Regardless of the capacity you order, you should make sure that the oil you put in your vehicle should not be under the limit or over that. Now, nobody wants their brand-new oil to overflow.

Q2. Do I Need To Change The Oil Filter Too With My Oil?

Yes, you should! It is extremely important to change the filter every 5000 miles because it is the only component that keeps the oil clean.

No matter what a brand advertises, oil can get dirty and contaminated. The filter cleans that dust and gets dirty in the process.

So, you have to change the filter because the old one’s effectiveness is reduced.

So, if you change your oil every 10000 miles, you must change the filter to 5000 when getting the oil changed again.

This ensures your engine is working at top-notch speeds and is clean from impurities.

Q3. Why Is My Cummins Burning Oil?

Before you jump to any conclusions, poor quality oil is not the only reason which causes oil to be consumed quickly, although it is the most common one.

Several other factors can play a major role in this. One reason could be worn tubing. Of course, if you have to change oil quicker than normal, this reason would be something to consider.

When you are getting your oil changed and looking for a different manufacturer, I will check to see if any oil is dripping from the underside.

If it is, you need to get it fixed ASAP before spending more and more money on oil bottles.

Also, if you see smoke rise from your hood, you need to stop the vehicle and call someone to fix it on the spot.

The reason for that is the oil must be leaking directly into the combustion chamber, which increases the chance of your truck catching fire.

You can notice oil-burning if your truck is driving rough. You were maybe noticing the engine misfiring and an overall unpleasant driving experience.

Q4. Can Bad Injectors Cause Oil Consumption?

Yes, they can. Poor quality injectors can inject too much fuel or dilute it, which then causes higher oil consumption.

If you are noticing both poor oil consumption and fuel efficiency, this may signify that the injectors are going bad.

Q5. How Often Should I Change The Oil In A 6.7 Cummins?

The vehicle manufacturer recommends that you change the oil every 6000 miles.

I guess they do live in old age as I suggested before with the Amsoil oil, oils that are produced nowadays last considerably longer than before.

These synthetic oils have better base oils which reduce emissions and last for more miles.


What are the reliable and trusted brand oils for Cummins 6.7 diesel engines

Choosing the right type of oil for your engine is an important decision that can alter the way you drive your truck.

With this article of the best oils for Cummins 6.7, you can be sure that change will be on the positive side.

Every single one of these products is designed to ensure maximum compatibility and performance.

But the Valvoline Premium Blue Engine Oil is the one that stands out from all other products.

It is my go-to recommendation for you, and it will provide you with a superior driving experience.