If you have Dodge Ram with a 6.7 liter Cummins engine, you’ve got a big time truck with lots of HP, tons of torque, and great towing capacity.
Now, just like with any other vehicle out there, no matter how good the engine is, it is going to require service and maintenance on a regular basis, not to mention the right engine oil too.
If you’ve got a 6.7 Cummins engine powering that beautiful truck, the right engine oil is going to make all the difference. The best oil for Cummins 6.7 will help keep that engine running smoothly, prevent buildups, maximize efficiency, and so much more.
That said, there are so many types of oil out there, that finding the best oil for Cummins 6.7 can be very difficult. This is what we are here to help you with right here and now, so let’s get to it.
Cummins 6.7 Oil Recommended by Manufacturer
If you want to find the best motor oil for Cummins 6.7 engines, the best place to find this information is in the owner’s manual, so this is exactly where we checked. According to the owner’s manual for the Cummins 6.7 engine, there are a couple of different options which you can explore, and it all depends on the make and model of your truck, as well as how high the mileage is too.
Cummins 6.7 Liter – 2007 to 2018
For slightly older Dodge Ram trucks that were made between 2007 and 2018, the official recommendation from the manufacturer is to use either SAE 15W-40 engine oil or SAE 5W-40 Engine oil. The official recommendation from Cummins is to use Valvoline Premium Blue 8600 ES SAE 15W-40 Engine Oil for temperatures over 0 Fahrenheit and can be used for lower and higher mileage engines.
Cummins 6.7 Liter – 2019
Now, for the newest of Dodge Ram trucks, the recommended oil for Cummins diesel engines, for the 2019 model, is either SAE 10W-30 engine oil or Valvoline Premium Blue SAE 5W-40 engine oil. The recommendation here is to go with the Valvoline brand name, although this could include others as well.
Seeing as there are so many different recommendations for the various models, we aren’t going to cover the pros and cons of each oil right now, as there is simply too much to cover (we will do this in the review section of each specific oil). However, something you do need to keep in mind is the viscosity rating of the oil, perhaps the most important consideration of all.
Remember that the first digit, the number before the “W”, designates how cold the oil can get before it starts to thicken too much, and the number after the “W” designates the other end of the spectrum, the maximum temperature.
5W-40 vs 15W-40 for 6.7 Cummins
One of the most important things that you need to know about 6.7 Cummins synthetic oil is that the different viscosity ratings provide various levels of performance, specifically in relation to temperature.
As stated by the manufacturer, Cummins, Valvoline Premium Blue SAE 15W-40 Engine Oil is designed to be used with engines that operate over 0 degrees Fahrenheit, whereas Valvoline Premium Blue SAE 5W-40 Engine Oil is designed to be used with engines under 0 degrees Fahrenheit.
As you can see, the viscosity rating makes a difference, and here particularly, it’s the first digit you need to keep an eye on. 5W is lower than 15W, and is therefore designed to work better with colder conditions, whereas the 15W is better in warmer conditions.
On a side, note, Cummins also states that 10W-30 Engine oil can be used for their Cummins 6.7 engines, but this is only for the newer 2019 models, such as the 2019 Dodge Ram. This oil performs very well in moderate temperatures.
|Type of Oil||Summary|
|SAE 5W-40||These oils work best for diesel engines operating at over 0 degrees Fahrenheit|
|SAE 15W-40||These oils work best for diesel engines operating at under 0 degrees Fahrenheit|
|SAE 10W-30||These oils can be used for the newer Cummins 6.7 2019 Dodge Ram|
Best Synthetic Oil for Cummins 6.7
Here we have a selection of the best oil for Cummins diesel engines, as well as short descriptions of each. Today we are going to take a look at the various products and oil types recommended by the manufacturer, as well as some other top picks of the best oil for Cummins too.
The top best product
- 1 Cummins 6.7 Liter – 2007 to 2018
- 2 Cummins 6.7 Liter – 2019
- 3 Wrap Up
- 4 5W-40 vs 15W-40 for 6.7 Cummins
- 5 Meet specification
- 6 Shell Rotella Full Synthetic 5W-40 Diesel Engine Oil
- 7 Shell Rotella T4 Triple Protection Conventional 10W-30 Diesel Engine Oil
- 8 Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic Engine Oil
- 9 Amsoil SAE 15W-40 Heavy-Duty Diesel and Marine Motor Oil
- 10 Triax Fleet Supreme ESP 10W-30 Ultimate Full Synthetic Engine Oil
- 11 Cummins 6.7 Oil Type By Year
- 12 2019 6.7 Cummins Oil Type
- 13 2018 6.7 Cummings Oil Type
- 14 2017 6.7 Cummings Oil Type
- 15 2014 6.7 Cummings Oil Type
- 16 Which Engine Oil is Best for Dodge Ram Cummins 6.7?
- 17 What Type of Oil does A 6.7 Cummins Take?
- 18 How Much is Cummins 6.7 Oil?
- 19 How Much Oil does a 6.7 Cummins take?
What should be noted is that the oil viscosity rating here, 5W-40, with this particular oil, is said to provide vehicles with 1.5% improved fuel economy over other options such as 15W-40. Due to the viscosity rating here, this oil can handle extreme temperatures with ease, both high and low temperatures.
Shell Rotella Full Synthetic 5W-40 Diesel Engine Oil is made with a combination of fully synthetic oil and premium additives which help to protect engines against dirt, soot, and other buildups. Overall, it’s made to protect engines for a long life. Finally, it should last about 5,000 miles before an oil change is needed.
Works for many diesel vehicles
Excellent engine protection
Allows for long engine life
More suitable for lower mileage engines
This particular oil is designed to be used with heavy duty engines, making this one of the best diesel oil for Cummins. Just like the above oil, this one is also made with shear stability to help prevent the loss of viscosity and to help maintain optimal engine oil pressure at all times.
This oil is also designed with a low ash formula to ensure vehicle emission compliance. This particular oil is also designed to enhance deposit protection to stop the buildup of deposits, this keeping engines cleaner over a longer period of time, and therefore reducing the need for frequent oil changes. This is an oil that can be used for lower mileage engines, but should perform well for higher mileage engines too.
Reductions of deposits
Increased engine protection
Does not need to be changed very often
In other words, this particular oil excels at maintaining viscosity in cold temperatures and provides for excellent cold start performance too. With that said, as you can tell from the viscosity rating, it also performs well in higher temperatures too. Simply put, this is probably the best 6.7 Cummins synthetic oil for extreme temperatures out there.
Something that stands out about this particular oil is that it provides for improved fuel economy potential over conventional 15W-40 oils. Some of the many benefits which this oil bring to the table include exceptional TBN retention, extended service, enhanced fuel economy, advanced soot control, and great all weather performance.
Improved fuel economy
Cummins recommendations for engines operating over 0 degrees
Excellent cold start performance
Advanced soot control
Can be used for low and high mileage engines
Next, this Amsoil SAE 15W-40 Heavy-Duty Diesel and Marine Motor Oil is ideal for higher mileage engines, but can be used for lower mileage engines as well. It is specifically designed to offer maximum protection from engine wear.
The special formula used here is made to reduce or even eliminate soot and sludge deposits, engine wear, corrosion, and more. Although Amsoil SAE 15W-40 Heavy-Duty Diesel and Marine Motor Oil is not the best in terms of fuel economy or the rate of oil change required, it does help provide very long lasting protection and performance.
For all heavy duty diesel engines
Great for protecting against buildups
Long lasting performance and protection
Fuel economy is not amazing
This oil also features Moly plating for excellent wear protection, oxidization protection, and high temperature stability too. Something else that stands out here is how this oil is made to eliminate the need to clean diesel particulate filters.
High temperature stability
No need to clean diesel particulate filters
State of the art ash dispersal
Cummins 6.7 Oil Type By Year
Although older models of the 6.7 Cummins engine are all fairly similar, there may be some differences which you should be aware of. So let’s take a look at some oil facts about these engines based on their year of manufacture.
2019 6.7 Cummins Oil Type
The recommended oil type for this engine is SAE 10W-30 or SAE 5W-40 full synthetic. The oil capacity of this engine is 12 US quarts. The 2019 Cummins diesel engine features 400 hp @ 2,800 rpm with 1,000 lb-ft of torque @1,800 rpm.
2018 6.7 Cummings Oil Type
The recommended oil type for this engine is SAE 15W-40 or SAE 5W-40 full synthetic. The oil capacity of this engine is 12 US quarts. The 2018 Cummins diesel engine features 385 hp @ 2,800 rpm with 930 lb-ft of torque @1,700 rpm.
2017 6.7 Cummings Oil Type
The recommended oil type for this engine is SAE 15W-40 or SAE 5W-40 full synthetic. The oil capacity of this engine is 12 US quarts. The 2017 Cummins diesel engine features 385 hp @ 2,800 rpm with 900 lb-ft of torque @1,700 rpm.
2014 6.7 Cummings Oil Type
The recommended oil type for this engine is SAE 15W-40 or SAE 5W-40 full synthetic. The oil capacity of this engine is 12 US quarts. The 2014 Cummins diesel engine features 385 hp @ 2,800 rpm with 850 lb-ft of torque @ 1,700 rpm.
Which Engine Oil is Best for Dodge Ram Cummins 6.7?
What Type of Oil does A 6.7 Cummins Take?
Depending on the year, this engine may take 5W-40, 15W-40, or 10W-30 Engine Oil.
How Much is Cummins 6.7 Oil?
You are looking at spending between $60 and $80 for average Cummins 6.7 engine oil.
How Much Oil does a 6.7 Cummins take?
The oil capacity of this engine is 12 US quarts.
The bottom line is that the right engine oil for your 6.7 Cummins can make all of the difference. Take a look at the recommendations, compare these to your own vehicle, and then go from there. The best engine oil for 6.7 Cummins will keep that engine purring smoothly for miles to come.