Best Synthetic Oil for Ford 6.7 diesel

The Ford 6.7 power stroke diesel engine is one of the most durable and reliable engines. It however needs maintenance regularly especially an oil change to ensure smooth working. Here are the best synthetic oils for your Ford 6.7 diesel engine.

The 6.7L diesel is Ford’s first in-house built power stroke and was first released in 2010. It has undergone some major improvements. As of 2020, at 1600 revolutions per minute (RPM), it had a 1050 lb-ft and 475 horsepower (hp) at 2600 making it the best diesel engine in horsepower and torque. This engine still powers Ford’s Super Duty trucks 10 years down the line.

These engines operate in extreme conditions and for you to continue operating in these conditions; your engine requires the right oil maintenance. After much consultation with mechanics and professional forums, here are the best synthetic oils for your Ford 6.7 diesel engine.

List of the Best synthetic oil for Ford 6.7 diesel


Top features


Shell Rotella T6 Synthetic Heavy-Duty Diesel Engine Oil

Reduces fuel consumption

Uses a highly stabilized formulation

Improves engine capabilities

Improves fuel economy

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Schaeffer 0700CK4 SynShield Durability Advantage Diesel Oil 15W-40

Contains a powerful formula

Excellent oil performance

Provides good engine protection

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Motorcraft Super Duty SAE 15w-40 Motor Oil

Provides a high protective measure

Improves engine performance

Has a unique oil formulation

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Lucas 10299-PK4 Synthetic 15W-40 Truck Oil

Offers excellent compatibility

Provides improvised efficiency

Performance is enhanced

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Ford Genuine Fluid X0-5W40-5QSD SAE 5W-40 Full Synthetic Diesel Motor Oil

Reasonable compatibility

Provides durable service

Consistent viscosity

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Shell Rotella T5 Synthetic Oil

Stable composition

Low fuel economy

Improves engine capability

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Valvoline Premium 8600 ES SAE Engine Oil

Provides an advanced protection

Prevents wear

High mileage

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Delo 400 SDE SAE 15W-40 Motor Oil

Prevents soot buildup

Low emission

Excellent oil practicality

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Royal Purple Duralec Synthetic Diesel Motor Oil

Meets the Ford 6.7 engine requirements

Good heavy-duty  formula

Improves fuel savings

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Shell Rotella T6 Synthetic Heavy-Duty Diesel Engine Oil

Shell is a leading brand in the area of engine oil and the Shell Rotella T6 Synthetic Diesel Engine Oil meets the CJ-4 standards. It continues delivering in the Shell Rotella T6 5W-40 Diesel Engine Oil when it comes to Ford diesel engines. Its composition is a combination of synthetic base oil and dispersant additives that protects your engine while retaining full efficiency.

From its name, it has a viscosity rating of 5W-40 which compared to the 15W-40 oils can save you up to 1.5% on costs. The SAE 5W-40 projects your engine against aeration and foaming using its low-ash formula with one of its best features being the Triple Protection Plus technology which protects your engine from wear and oil breakdowns and deteriorating deposits. This product saves you costs when it decreases your oil consumption rate.

It has an advanced formula that helps it maintain vehicle emission compliance and can sustain interior oil pressure using its complete stability that resists loss of viscosity.

Overall, the Rotella T6 is widely recommended due to its value and reliability making it widely used engine oil on the Ford 6.7 diesel engine.


  • Enhanced engine performance
  • Better fuel economy
  • Excellent resistance to heat
  • Advanced formula
  • Limited warranty of 500, 000 miles


  • Prone to slight leakages

Schaeffer 0700CK4 SynShield Durability Advantage Diesel Oil 15W-40

This Schaeffer 0700CK4 SynShield Durability Advantage 15W-40 Diesel Oil by SynShield offers your engine protection in the most extreme conditions; be it corrosion, temperature, or even mud, it will see you through. Its powerful formula contains Penetro and Micron Moly that maintains constant lubrication to reduce internal friction with the result being minimized heating. 

Its Synthetic formula also offers moderate viscosity and strong oxidation which helps your Ford 6.7 diesel engine maintain maximum efficiency. Also, the additives make soot-busting and deposit-dispersing faster to protect your engine against wear, aeration and foaming.


  • Excellent weather protection
  • Advanced wear resistance
  • Control over contamination
  • Extends oil utility
  • Long-lasting
  • Protects the engine


  • Limited compatibility with engine
  • More expensive

Motorcraft Super Duty Motor Oil

This high-quality product from Motorcraft is what Ford recommends for their Ford 6.7 diesel engine as it is formulated by Ford Motor Company to guarantee the best performance. This is one of the few brand-specified products that meet all engine requirements for your Ford 6.7 diesel engine. Its formula of proprietary additives and premium hydro processed base oils gives the best performance and protection that your Ford 6.7 diesel engine needs.

You can count on it to give your engine a good service whether on a truck, heavy machinery, or bus as it is good for heavy-duty tasks. Its viscosity ratings as the name suggests are 15W-40 and can sufficiently support your engine in average temperatures such as 20°F without freezing inside your engine. It’s highly recommended for vehicles with over 200, 000 miles.

Also, the additives in its formulation support older engines.


  • Superb engine lubrication
  • The formula is specific to a brand
  • Blend of oil of unique and premium
  • Prevents corrosion and wear
  • Works with old diesel engines
  • Meets Ford requirements


  • Costly

Lucas 10299-PK4 Synthetic 15W-40 Truck Oil

The Lucas 10299-PK4 Synthetic Truck Oil cleanliness is unrivaled by other oils and it serves both old and new engines giving your engine almost twice the durability of other 15W-40 oils in the market. It has a viscosity rating of 15W-40 but adds further longevity to your engine by running up to 30,000 miles without requiring a change. This oil is well equipped to handle severe heat and weather conditions. This high-quality oil works best on a diesel engine such as your Ford 6.7 engine as well as an SUV, lawn equipment and gas pickups.


  • Engine cleanliness superiority
  • Increases your car mileage
  • Weather and heat resistant
  • Its oil base is powerful


  • Packaging is questionable
  • Questionable packaging

Ford Genuine Fluid X0-5W40-5QSD SAE 5W-40 Diesel Motor Oil

The Ford Genuine Fluid 5W-40 SAE Diesel Motor Oil is another top oil brand for your Ford 6.7 diesel. It has a unique 5W-40 viscosity rating that promises to protect your engine against friction and reduces its deterioration by sufficiently resisting heat and weather conditions. Its fully synthetic formula is aimed at improving the newer engine’s efficiency. BY using the brand-specified liquid, you’re guaranteed your Ford 6.7 diesel engine retaining its overall efficiency capability. This oil is designed to give your Ford 6.7 reliability as it meets the strict requirements of the Ford 6.7 engine without compromise. This oil is suitable for new engines only.


  • Engine durability
  • Has excellent viscosity
  • Brand-specified for cars


  • Not suited for old engines

Shell Rotella T5 Synthetic Oil

This Shell Rotella T5 Oil is a top shell brand that you can trust. It has a low-ash formula that reduces the oil change intervals by allowing you to control in exhausting areas. It has a viscosity rating of 15W-40 that prevents breakdown and improves oxidation in the process. Its service interval makes it quite a low fuel economy. Its composition of fully synthetic oil and multi-functional dispersants makes it one of the most advanced oil formulas.

The engine requirements exceed that set by API CK-4 by about 37%. It also comes with the Triple Protection Plus Technology to give your engine a reliable performance throughout its serviceable life.


  • Resistant to breakdown
  • Good fuel economy


  • Weak container sealing

Valvoline Premium 8600 ES SAE Engine Oil

This is another brand-specified formula meant for maximum performance. Its formula contains the effective and unique Dispersive Polymer Technology (DPT) to handle soot levels of oil filter as well as preventing the engine’s cold startup. It resists unwanted build-up in the engine’s chamber using ring protection reducing wear. The fluid even goes further to clear your single and two-piece pistons. Although the Valvoline Premium Blue 8600 ES SAE Engine Oil is designed for Cummins, it’s also recommended for your Ford 6.7 diesel engine. Its Total Base Number (TBN) is high.


  • Good oil performance
  • Provides wear protection
  • Good compatibility with engines
  • Advanced lubrication formula


  • Packaging is poor

Delo 400 SDE SAE 15W-40 Motor Oil

The Delo 400 SDE SAE 15W-40 Motor Oil is brand-specified oil that works on your Ford 6.7 diesel engine. Its formula is composed of advanced ISOSYN Technology that prevents buildup by encouraging soot dispersion which reduces your fuel cost. Your engine’s integrated particulate filters can handle a low/ultra-low sulfur or medium sulfur diesel fuel. Delo’s SAE oil can with sulfur contents ranging from low to high.

This oil is suited for post-2007 models as it meets the low-emission requirements for engines. The Delo 400 SDE SAE 15W-40 Motor Oil is premium motor oil that improves mileage by keeping the interior clean and can work on both conventional and old gasoline engines.


  • Meet the low-emission engine requirements
  • Works well with sulfur fuels
  • Premium and efficient formulation


  • Slight oil breakdown

Royal Purple Duralec Synthetic Diesel Motor Oil

Royal Purple is yet another high-quality brand doing rounds for years in the industry, especially with heavy-duty vehicles and race cars. The Duracec Ultra 10W-30 CI-4 plus engine oil is high-performance oil made for heavy-duty diesel engines. Its Synarlec additive technology protects the engine parts by preventing metal-to-metal contact when it forms an ionic bond with metal surfaces.

The Royal Purple Duralec Synthetic Diesel Motor Oil gives your engine a longer life by offering resistance to corrosion and oxidation and further prevents soot, dirt and other deposits from forming on your Ford 6.7 diesel engine.


  • Great engine protection
  • Long engine life
  • Advanced synthetic formulation

Buying guide for the Best Synthetic Oil for a 6.7 Ford Engine

Ford recommends API CJ-4 motor oil for its Power strokes as they generate more heat compared to other diesel engines since they operate in extreme conditions. A viscosity rating of 10W-30 is standard and 15W-40 oil is recommended for biodiesel and heavy use. So, when choosing motor oil for your 6.7 Ford engine, you need to put a few considerations in mind to help you pick the best oil for your vehicle.


This is an important factor since you don’t want to end up messing your Power stroke. Since a Power Stroke needs high engine protection from high temperatures and combustion by-products, the least you can do is sticking to WSS-M2C171-F1 which is Ford’s specification. You should go for high-mileage diesel oils if your car has a mileage of 100, 000 – 150, 000. 


When choosing engine oil for your power stroke, check for the temperatures that your truck or vehicle operates in as the temperature has a direct influence on the oil viscosity defined as the oil’s ability to offer resistance in high and low temperatures. Viscosity increases in low temperatures and decreases in high temperatures. This has made oil manufacturers improve their base oil by adding improvers. Engine oils fall into two categories: multigrade and monograde. The multigrade oils are ideal for both high and low temperatures and include SAE 15W-40, 5W-40 and more.  Monograde oils on the other hand come as summer and wintertime oils. Monograde oils with the letter ‘W” in them such as 10W are for winter while for summer you have grades such as 20, 30, etc. Although Ford recommends a 15W-40 rating for your heavy-use Ford 6.7 diesel engine, you should check your user manual for your car’s viscosity ratings.


The additive technology used in the engine oil should give your Ford 6.7 engine protection against harmful contaminants such as deposits, direct, sludge and many others. Some additives can boost your engine’s performance increasing its life and fuel economy. Corrosion inhibitors protect your engine against wear and tear while detergent and dispersant additives are good at cleaning dirt foaming in the oil.

Ford 6.7 diesel engine oil Change Guide

Raise your car using a jack stand and undo the drain plug. Then drain the oil completely and put the plug back. Next, undo the oil filter using an oil filter removal, replace it with fresh engine oil and then install the new oil filter. Then clean up by wiping everything.


What is my 6.7 Power stroke’s oil change capacity?

The oil capacity for a Ford 6.7 diesel engine with a filter is about 13 quart.

How often should I change my Ford 6.7 diesel engine oil?

It depends. You can however change the oil every 7500 miles.


You need the right oil that at least meets Ford’s specific requirements to ensure your Ford 6.7 diesel engine works optimally. You can now pick the right oil that you have a list of the best synthetic oils for your Ford 6.7 diesel engine. The Motorcraft Super Duty Motor Oil produced by the Ford Motor Company tops the list because of its overall performance in cleaning, lubrication, and generally. 

Also read

Best Oil Filter for 6.7 Cummins

Best DSG Transmission Fluid

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