Best Synthetic Oil for Ford 6.7 Diesel

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Best Synthetic Oil for Ford 6.7 Diesel

While it may be the most important, fuel is not the only requirement for a vehicle engine to perform. One way you can maintain and improve your engine’s performance is by using a high-quality synthetic oil, with frequent replacement at regular intervals. Powerstroke engines are designed for extreme operation, and as such, they require a high level of maintenance. However, getting the best oil for Ford 6.7 Diesel is not so easy. To make it less problematic for you to choose the right oil, we have selected and reviewed some of the best available on the market today.

10 Best Synthetic Oil for Ford 6.7 Diesel

Last update on 2021-12-05 at 04:12 / Affiliate links / Images from Amazon Product Advertising API

1. Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil

Key Features

  • Advanced Low-Ash Formulation
  • Improved Fuel Economy
  • Triple Protection Plus Formula

This Diesel Oil is a fully synthetic oil that’s formulated with premium synthetic oils and protective additives that prevent wear, tear, deposits, and oil breakdown. The oil features a unique Triple Protection technology that makes for an improved level of engine protection and extended engine life. One thing that makes the Shell Rotella T6 5W-40 stand out is its effect on reduced fuel consumption. The Shell Rotella T6 is one of the best 6.7 Powerstroke synthetic oils for your diesel engine today.

Furthermore, it is engineered with shear stability, such that it resists viscosity loss and maintains good engine oil pressure. Thanks to additive technology, your engine is protected from the damaging effects of dirt and contaminants. Additionally, the low-ash formula gives you more control over preventing the blocking of exhaust devices. The protective effect of the oil is not compromised in extreme operating temperatures, as it resists breakdown by heat for continuous engine protection.


  • It makes for  efficient fuel consumption  
  • Impressive heat resistance
  • It is very durable
  • 100 percent synthetic


  • Prone to leak

2. Delo 400 SDE SAE 15W-40 Motor Oil

Key Features

  • ISOSYN Advanced Technology
  • Wear-Resisting Action
  • Low-Emission Action

The Delo 400 SDE SAE 15W-40 Motor Oil features one of the most advanced additive technologies for an outstanding level of protection. One of the effects of a high-quality oil like this on diesel engines is minimized operating costs due to the exceptional soot dispersion and wear control it offers. The formulation process incorporates the unique and effective ISOSYN technology that significantly improves the soot dispersion. What’s better? The oil is perfect for ultra-low sulfur, normal sulfur, and low sulfur diesel fuels.

Furthermore, it is specifically formulated to meet up to EGR and SCR engines’ standards, and it complies with passenger car requirements. In addition to its durability, the oil meets up to the standards of low-emission engine requirements. Also, it is quite effective for both old and conventional gasoline engines. Another benefit of the oil’s advanced wear-resisting action is that it keeps the internal part of the engine clean, and that makes for improved mileage.


  • Highly durable
  • The oil meets low-emission requirements
  • Effectively disperses soot buildups
  • High-performance additive chemistry


  • Oil may break down slightly

3. Valvoline Premium 15W-40 Diesel Engine Oil

Key Features

  • Superior Wear Protection
  • Best Oxidation Resistance
  • One Solution Technology

Valvoline is an American company that has been around since the 19th century, and they are well known for their automotive services and lubricants. The highlight of the Valvoline Premium 15W-40 Diesel Oil is its versatility. It is available for a wide range of heavy-duty engines, including gas, diesel, and natural gas applications. Its versatility encompasses modern emission-treated diesel engines and includes those that feature exhaust gas recirculation, diesel particulate filters, and other diesel engine technologies.

Thanks to its impeccable oxidation resistance, long oil life is ensured in your heavy-duty engines. The 15W-40 viscosity is the perfect viscosity for Ford 6.7 Powerstroke engines. Like you would expect from any good engine oil, it has superior wear protecting effect in heavy-duty engines with parts grinding over each other. The oil is specifically recommended for Cummins, but it is likewise perfect for 6.7 Ford Powerstroke.


  • Versatile one solution technology
  • Impressive resistance to oxidation
  • More efficient fuel consumption


  • Some buyers have reported cases of leaked oil containers

4. Shell Rotella T5 Synthetic Blend 15W-40 Diesel Oil

Key Features

  • Synthetic Heavy-Duty Blend
  • Improved Oxidation Protection
  • Triple Plus Technology

Shell Rotella diesel oils feature a special Triple Plus technology that is very efficient against wear, deposits, and oil breakdown. The Shell Rotella T5 Synthetic Blend 15W-40 exceeds the highest wear requirement in the API CK-4 engine wear test by an impressive 37 percent. Compared with previous formulations, it delivers improved oxidation performance responsible for its increased resistance to breakdown under high temperatures. As long as you stick to the OEM recommended drain interval, the Shell Rotella T5 maintains its oil viscosity.

Its low ash formulation reduces blocks in the exhausting parts. Through its improved oxidation effect, the heavy-duty synthetic formulation resists unnecessary oil breakdown and improves the overall fuel efficiency. We should also comment on the versatility of the oil. It is a great diesel oil choice for on-road machines, agriculture machines, pick-up trucks, and other high-power vehicles that require high resistance to heat and wear. Furthermore, it offers protection against the natural corrosive effect of the fuel.


  • It prevents corrosion and oxidation
  • It is 37 percent more effective than the recommended wear requirements
  • It has is a low-ash formulation
  • Excellent wear-protection


  • It is not the most affordable oil

5. Schaeffer Manufacturing Co. Synshield 15W-40 Diesel Oil

Key Features

  • Highly Durable
  • Strong Oxidation Control
  • Low Ash Formula

Diesel engine maintenance encompasses providing additional lubrication and wear protection by the timely application of suitable oils. This Schaeffer Manufacturing Co. formulation is one of the best Ford diesel oil recommendations available on the market today. The oil is also one of the most durable on our list, with strong oxidation and impressive viscosity control. Like all the other oils we have selected, it effectively combats soot buildups and disperses contaminating deposits quickly.

The highlight of the oil is the patented Synshiled technology that is made up of a special formulation that reduces internal friction. The reduction of internal friction combined with consistent lubrication makes for lower fuel consumption. Thanks to the additional detergency, you get more protection against foaming, aeration, and rapid wear. If what you need is a reliable 6.7 Powerstroke synthetic oil to combat the oxidation, aeration, and deposit contamination that 6.7 stroke engines are prone to, this is one of the best options you have.


  • Reliable wear protection
  • Excellent oxidation resistance
  • Protection against friction


  • It is not the most affordable option

6. Ford Genuine 15W-40 SAE Super Duty Diesel Motor Oil

Key Features

  • Unique Additive Technology
  • All-Season Oil
  • Fully Synthetic Formulation

What other best oil for ford diesel engines recommendations could we have given without including the Ford Genuine 5W-40 SAE. It is a premium formulation made from high-quality hydro-processed base oils through a special additive technology. We like that the oil is reasonably priced. The kinematic viscosity of the oil is perfect to evenly protect the interior of your engines, even at high temperatures, as it has a high viscosity maintenance level.

It should only be used for diesel engines and not gas engines. While it is not a hundred percent synthetic, it is still a semi-synthetic blend that’s perfect for 6.7 Powerstrokes. Furthermore, the oil is very durable and lasts for a long time. It meets the API CJ-4 requirement that’s recommended for 2007 highway exhaust standards. It is also perfect for ultralow sulfur fuel. For added durability, the oil is friction-modified with micron and penetrate.


  • It is not too expensive
  • It is versatile
  • It retains its viscosity at high temperatures
  • High level of protection against wear


  • It cannot be used in gasoline engines with catalysts

7. Overall Best – Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil

The Shell Rotella T6 is our pick as the overall best synthetic oil for Ford 6.7 diesel. The heavy-duty motor oil was formulated to meet up with post-2007 modern low emission standards. It is one of the most versatile diesel oils you can get, perfect for ultra-low, normal, and low sulfur diesel fuels. It is also quite interesting that the oil can be used in older typical engines and also in gasoline engines. The advanced ISOSYN technology and excellent emission control system life make for an improved level of wear resistance and deposit breakdown for long engine life. What more could you want in diesel oil?

Features and Factors to Consider When Choosing The Best Oil for Ford Diesel Engines

One of the gravest mistakes you’ll make is to feed substandard oil into your engine. Fuel consumption and maintenance costs will considerably increase in the absence of good quality oil. Besides, you may end up ruining your vehicle’s engine when you use substandard oil. Thankfully, 6.7 Powerstroke diesel engines are not too selective when it comes to diesel oils. Here are the features and factors to pay attention to before choosing a synthetic oil for Ford 6.7 Diesel.


Viscosity is a measure of an oil’s thickness. It may seem inconsequential, but it does affect the functionality, as the resistance to the oil’s flow is dependent on the level of viscosity. For Ford 6.7 power stroke engines, we recommend 15W-40, but 5W-40 is the more versatile viscosity, as it gives a wider range of operating temperature for the engine oil.

Oil Composition

While we have exclusively selected synthetic diesel oils, there are other composition types available. It would be best if you went for a fully synthetic oil – maybe with additives. Synthetic blends are a mixture of different oils, and they could contain impurities that will significantly shorten the lifespan of the oil.

Additive Package

Diesel engines differ significantly from gasoline engines in their interior structure. Thus, it is essential that the oil you choose has an additive package specific to your diesel engines to prevent rapid wear. Nonetheless, you should choose one that has a strong additive package so it can effectively combat soot, deposit, and sludge buildup.

Internal Protection

Lubrication is one of the essences of applying engine oils. The friction that arises from moving machines grinding on each other causes gradual wear and tear. Check the API classification on any oil and establish the manufacturer’s standards it meets up to before you buy.

Emission Control

Contemporary 6.7 Powerstroke engines come with upgraded emission systems, quite different from those in older models. You have to check an oil’s compatibility with your engine’s emission facility. Usually, the oil’s suitability is specified in the manufacturer’s information/recommendation.

What Kind of Oil Is Best for 6.7 Powerstroke?

Synthetic oils are the better option for 6.7 Powerstrokes, fully synthetic oils, more preferably. The relatively newer internal working systems require improved formulations apart from the typical standard oils used in older engines. To efficiently manage the extreme heat, deposit buildup, and wear in 6.7 Powerstrokes, go for full synthetic or synthetic blends.

Step by Step Guide on How to Change The Oil in 6.7 Powerstroke

We don’t recommend changing the oil yourself if you don’t have experience changing vehicle oil, as it could quickly become messy if you’re not sure of what you’re doing. Nevertheless, if you’re sufficiently handy and adequately prepared, you can get it done in no time. Here’s how to go about it.

Prepare the truck

The first thing to do is park your truck on an even and leveled surface. Secure the truck in the park option. You may want to warm the engine for a bit to make the oil more fluid. However, it is not compulsory, and you should be careful not to get hot oil on your body

Drain the old oil

After you might have secured the truck in the perfect location, the next thing to do is undo the drain plug and get the old oil out. Find the drain plug on the low part of the oil pan. The drain plug can be hard to undo at times, but with enough effort, you should be able to undo it with some effort. Fully unscrew the drain plug and let the oil drain completely into the drain pan.

After the oil has fully drained, you’ll have to screw the oil drain back in. Ensure you fix back the o ring so it’ll stay in place. You should also pay attention not to overtighten the oil drain.

Remove the oil filter

With your oil filter removal tool, lose the oil filter until you notice the oil coming out from the top. Remove the oil filter. However, you should let the remaining oil drain dully before removing the oil filter to avoid making a mess. 

If you notice that the old rubber gasket sticks to the filter housing after removing the filter, be sure to remove it before moving on.

Fill the new filter with oil and install

The only way to ensure that oil gets to the vital lubrication points and prevent quick wear is to fill the new filter with new oil. If this is not done, you’ll be surprised at the wear rate after a few times of use. Additionally, you should also lubricate the rubber gasket that comes with the new oil filter to reduce or even eliminate the leaking risk. After filling with oil, hand-tighten the filter or use an oil removal tool.


At this point, you want to check if there is an oil leak on the filter or the plug. Wipe the plug and new oil filter clean and check for any apparent oil leak. If there is none, you can move on with the oil changing process. 

Fill with fresh oil

You can now fill the engine with the new oil. However, check the oil level as you fill and ensure that you don’t overfill. Replace the cap when you’re done, and test start the engine. Run the engine undisturbed for some minutes and check for any leaks under the truck.

Frequently Asked Questions (FAQs)

How often should oil be changed in 6.7 Powerstroke?

While there is no specific rule concerning the interval for changing the oil in Powerstroke 6.7 engines, the interval is usually specified in the manufacturer’s recommendation. To keep your oil effective and your engine in the best of conditions, you should change the oil after every 5000 miles.

What oil brand is recommended for Ford?

While several oils can be used with Ford 6.7 Powerstroke engines, the company recommends the Ford Genuine 5W-40 SAE Super Duty Diesel Motor Oil as the standard to get the best performance from Ford 6.7.


Synthetic oils have become the standard when it comes to diesel engine maintenance. Ford 6.7 Powerstroke engines have a unique internal configuration that requires the lubricating effect of decent diesel oil. While it can be quite overwhelming to pick the perfect oil for your engine, these are some of the best full synthetic and synthetic blend oils you can get. Also, we’ve discussed some of the important things to consider when buying diesel oil.

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