Check These 3 Best Oil For 12 Valve Cummins


Any cylinder with two valves that are in the ‘B’ engine category and capable of running trucks to turbo and so on are 12 valve Cummins.

These engines naturally need extra power to fulfill their tasks. Any synthetic oil which can promise to provide all the facilities and sometimes more than what an engine looks for are perfect for 12 valve Cummins to go on.

While looking for the best motor oil, we found a few collections for this engine. Here we present all the best oil for 12 valve Cummins and they are detailing for your benefit.

Best Oil for 12 Valve Cummins

Product’s Name Viscosity Key Benefits Price
Mobil 1 Synthetic Motor Oil 5W-30 Increase Engine Mileage Details On Amazon
Chevron Delo 400 15W-40 Improve Riding Quality Details On Amazon
Shell Rotella T6 15W-40 Solve Low Temperature Flow Details On Amazon

Let’s enjoy the top 3 oil for 12 valve Cummins, now.

1. Mobil 1 Synthetic Motor Oil– Outstanding Mileage with Fewer Engine Wear and Frictions

Mobil 1 is one of a kind in the total fuel varieties, which not only offers the best of all but also meets all your expectations easily. It provides 5W viscosity in winter and 20W viscosity in summer indeed a good deal according to other offers. You have surety of less engine wear with excellent protection. As a result, you will face as minimum frictions as possible.

At the same time, this fuel makes sure of clearing all sludge or mud stuck inside it. It extends the engine’s life and working capacity.

A few unique features why people notice this fully synthetic Mobil 1 motor oil as the best oil for 12 valves Cummins are stability in the case of both heat and oxidation. Quick change with weather demand and performance after changing the oil is tremendous in the word of customers.

You will get six packs inside 1 quart of 32 ounces, which is a win-win situation for both sellers and buyers.


  • Repels sludge or muds.
  • Minimum fuel consumption.
  • Reduce oil pressure and engine stress.
  • Performs best at all temperatures.
  • Engine wear safety and fewer frictions.


  • 6 packs in one packaging seem hazardous for some users.

Available On Amazon

2. Chevron Delo 400– Premium Quality Motor Oil

Delo 400 oil is a USA manufactured engine oil. It will be a perfect oil for your 12 Valve Cummins engine. This standard level of oil has a viscosity of 15 and 40 in lower and upper temperatures, respectively.

The oil is made with ISOSYN technology, which provides the best quality. And the 15w40 viscosity defines the standard level of flowing thickness. So, whether you use this engine for on-road driving or off-road, it will cover full mileage.

This oil benefits with an optimum type of maintenance issue. Delo 400 oil is not fully synthetic oil but can provide the engine parts with decay-free lubrication.

It can perform well both in Ultra Low Sulphur Diesel engine and regular Sulphur diesel engine.


  • Trustworthy brand
  • Premium quality oil
  • Budget-friendly oil for Cummins engine
  • Protection for engine wearing up to 50%


  • Not fully synthetic

Available On Amazon

3. Shell Rotella T6– 1st Gen Cummins Oil with Extra Protection

Shell Rotella brings oil with triple plus protection for the engine parts. You won’t get another oil with a viscosity of 15w40 with such fuel economy features.

It is an oil with some high-quality additives. And the oil is made of fully synthetic base oil. It will lubricate your engine parts with a standard level of viscosity and won’t consume much oil at a time.

The additives formulation helps to protect the engine parts from black coal smut, any dirt, or other contamination of oil.

The perfect viscosity helps to maintain the engine pressure in an optimum way. Also, it protects the oil from fast oxidize.


  • Up to 1.5% fuel economy than others
  • Shear consistency does not let viscosity loss
  • Does not allow the oil contaminating
  • Excellent engine oil with triple protection formula
  • HighPerforming diesel oil protecting against wearing


  • No ISOSYN technology here
  • Some find it expensive

Available On Amazon

How To Pick The Best Oil for 12 Valve Cummins?

How To Pick The Best Oil for 12 Valve Cummins

When you are buying oil for your engine, you must know your engine recommendations. But along with that, you should consider some other facts such as vehicle storing location, driving criteria, temperature conditions, etc.

So, here we are showing you how we have picked oil for 12V Cummins.

Engine Oil Type

Engine oil type is the first and primary concern you need to think about. There are mainly three types of oil: typical conventional oil, full synthetic, and synthetic blend.

If you want to know the 12 Valve Cummins oil type, it would be better to go for the fully-synthetic one. But sometimes there can be some use of chemicals as additives.

These additives help to provide extra protection and other featuring benefits also.

Oil Viscosity Level

Oil viscosity level is another essential thing you need to consider. You will feel the need for this badly when the weather temperature falls acutely less than 30° F.

It means when your vehicle has to start from in cold storage, it will need a quite good viscosity to flow instantly without leaving any corrosion among the parts. For the 12 V Cummins, it is better to use 15w40, 5w30, or 10w30.

If you want to know the variations between these 5w3o and 10w30 oils, check the differences between 0w20 vs 5w20 to be master in choosing the right viscosity of the oil.

Driving Type

Where you will be riding also impacts in case of choosing the oil. You should choose the oil considering your riding type on-road or off-road.

For off-road riding, choose full synthetic oil for maximum lubrication.

Brand Quality

Engine oil is the protective shield for your engine parts, but it can also be a harmful throne if you do not choose a good brand.

If you buy any cheap low-quality oil where there is contamination you might not know, you will be paying great for saving such less.

So, look for the best quality oil for your engine.

Frequently Asked Question (FAQs)

What are 12 valve, Cummins?

The 12 valve Cummins has two valves in each of their cylinders. They used to apply with a ‘B’ category engine such as lightweight trucks. They are good at humble pickup than any other in the competition.

How far does a 12 valve Cummins go before another oil change?

This fuel is famous for giving great mileage. You can easily travel 5000 miles or more with one change. In the case of turbochargers or trucks or turbo spin, it may reduce a bit. Still, the mileage would not disappoint you.

Is this oil a synthetic blend?

This motor oil is a fully synthetic advanced motor oil. It has produced from crude oil and lubricates the engine as an authentic synthetic oil. The thicker viscosity and refining procedure are another example of its being a pure synthetic fuel.

Final Word

The different engine requires different types of oil-based on various facts. In the case of 12V Cummins oil, you must choose something heavy-duty diesel oil.

And here, you will get the best oil for 12 Valve Cummins cars along with the instruction guide that you may need at the time of purchase.