Cummins 6.7: Everything You Need to Know About This Engine

In the world of engines, one has become the most powerful energy-driving model in the world, trusted by both the general public and industry experts: the Cummins 6.7. This diesel engine is certified as highly durable machinery, and since its release, it has been one of the most sought-after engines.

Cummins Engine Co., the company founded in 1919 by Clessie Cummins and his business partner William G., foresaw the future of diesel long before diesel itself knew what it would become. Over the past century, the diesel engine has undergone several changes and improvements, leading to more robust and efficient designs. This evolution paved the way for creating new and improved engines, but what year did the 6.7 Cummins come out?

The engine debuted in 2007, replacing the 5.9L iteration and enhancing baseline power. Its first version started with 350 horsepower and a robust 650 lb-ft of torque. The latest model, launched in 2021, the high-output 6.7L Cummins Turbo Diesel, surpasses all previous achievements. With an impressive 420 horsepower and 1,075 lb-ft of torque, it takes power to the next level.

Why the Cummins 6.7 Is Among the Most Sought-After Engines: Features

Beyond raw power, one notable feature of the Cummins 6.7 engine is its intelligent exhaust brake, assisted by its variable geometry turbocharger. This exhaust braking system helps drivers carrying heavy loads on steep grades maintain a reasonable speed.

Why is this important? Because a heavy-duty truck is much heavier than an average vehicle. The extra weight it carries makes it especially difficult to brake downhill. With other types of engines, drivers often have to stop more frequently at truck stops to check that everything is functioning correctly. This highlight of the Cummins 6.7 provides drivers with greater peace of mind.

The Cummins 6.7 system helps control speed through turbocharger backpressure, so drivers don’t need to worry about overusing the brakes or going too fast on a mountain road. Using an exhaust brake is not only excellent for navigating rugged terrain but can also help ensure that regular brakes last longer. The turbocharger is one reason why the Cummins diesel engine has become much more efficient in recent years.

What Is the Best Delete Kit for 6.7 Cummins?

The Cummins 6.7 engine is renowned for its strong performance, fuel efficiency, and reliability, making it a popular choice for diesel trucks. However, like many modern diesel engines, the Cummins 6.7 has an EGR (Exhaust Gas Recirculation) system.

The EGR system is designed to reduce nitrogen oxide (NOx) emissions by recirculating a portion of the exhaust gases back into the engine’s combustion chamber. The EGR system has some drawbacks that can affect engine performance and longevity, such as carbon buildup, clogs, and increased operating temperatures.

When looking for performance enhancements that lead to better fuel efficiency and a more pleasant driving experience, the Flashark EGR delete kit is the best option on the market and a favorite among experts.

Benefits of the Flashark EGR Delete Kit

Flashark is a renowned brand known for its high-quality performance upgrades. By eliminating exhaust gas recirculation, your Cummins 6.7 engine can draw in fresh, oxygen-rich air, improving airflow and combustion efficiency. Key features and benefits of the Flashark EGR delete kit include:

• Improved airflow and combustion efficiency: Removing the EGR system allows the engine to operate more efficiently, enhancing power delivery and torque. This translates to better acceleration and overall performance.
• Eliminating carbon buildup and clogs: By preventing exhaust gas recirculation, the Flashark EGR delete kit reduces the likelihood of carbon deposits accumulating in the intake manifold and other engine components. This helps maintain optimal engine performance over time.
• Reduced operating temperatures: Without recirculating hot exhaust gases, operating temperatures decrease, promoting a healthier and more stable engine.
• Extended engine life and reliability: Removing the EGR system’s negative impact can contribute to a more reliable and durable engine, reducing the risk of costly repairs.

How Many Gallons of Oil Does a 6.7 Cummins Take?

Oil changes are vital for keeping the Cummins 6.7 in excellent condition. But there’s something you should know: this type of engine requires a lot of lubricant.

If you’re wondering how much oil a 6.7 Cummins takes: approximately 12–13 quarts or 12.3 liters of engine oil. The equivalent of 12 to 13 quarts in gallons is about 3 to 3.25 gallons. Keep in mind that the oil capacity of an engine depends on how much it can hold.

Another thing to consider is the oil weight the engine requires. For the Cummins 6.7, engine designers recommend two oil weights: 15W-40 and 5W-40. The 15W-40 is recommended for those driving above 0°F, and the 5W-40 for frigid temperatures below 0°F.

Ideal Oil for a Cummins 6.7

The recommended oil type for a 6.7-liter diesel engine is typically a low-viscosity, high-strength diesel engine oil to withstand the demands of a high-torque diesel engine. The most recommended options are:

• 15W-40 Oil: This is one of the most common options for heavy-duty diesel engines in normal or warm conditions. It is resistant to high temperatures and provides excellent protection.
• 5W-40 Synthetic Oil: This is ideal for cold climates or for those seeking better overall engine protection. It performs better in low temperatures as it flows more easily on startup and remains resistant to high temperatures.

Always check your vehicle’s manual to know the exact recommendations regarding oil type and change intervals, as factors like climate, usage conditions, and load can influence the choice of oil.

The Cummins 6.7 engine is one of the most widely used models in truck fleets across the United States due to its quality, power, and features that ensure a longer lifespan. If you’re wondering, is the 6.7 Cummins reliable? The answer is absolutely.