Who Makes The Best Diesel Truck Engine?

The Duramax 6.6-liter (Chevy/GM), Cummins 6.7-liter (Dodge), and Powerstroke 6.7-liter are widely regarded as the best diesel engines for pickup trucks in 2021-2022.

When evaluating engines, horsepower is a typical criterion. People pay special attention to peak horsepower. Only when the engine reaches a certain number of revolutions per minute does it reach peak horsepower (rpm). The purpose of an engine is to generate and deliver power to the truck. As a result, more horsepower often equates to better acceleration and top speeds.

Torque is a another way of measuring power. Torque is the force required to propel a truck from a halt and to transport big cargo. Torque is measured in pound-feet, or lb-ft for short, as previously stated.

At 3,200 rpm, the Duramax 6.6-liter diesel engine produces 360 horsepower and 650 pound-feet of torque at 1,600 rpm. At 2,800 rpm, the Cummins 6.7-liter produces 385 horsepower and 865 lb-ft of torque at 1,700 rpm. The Powerstroke has 275 horsepower at 2,800 rpm and 525 pound-feet of torque at 1,600 rpm.

Remember that while fuel economy saves money on gas, it is also more expensive. Your truck’s fuel efficiency is also influenced by a number of other factors. Your truck will be less fuel efficient if you put an engine in it with a crew cab, extended bed, and other similar upgrades.

Comparing the base model of the Chevrolet Silverado 3500 (Duramax) against the Dodge Ram 3500 (Cummins) and the Ford 350 is one way to do it (Powerstroke).

The Silverado 3500 gets 17 mpg on the freeway, 23 mpg on the motorway, and 19 mpg on the highway (city and highway combined). The Ford F-350 gets 9 mpg, 15 mpg, and 11 mpg, while the Dodge Ram gets 13 mpg, 16 mpg, and 15 mpg.

Being a great engine requires a high level of dependability. When the engine is in the shop, performance is irrelevant. All three of the aforementioned engines are said to be trustworthy, but continue reading for more information on potential issues.

Because replacing an engine is expensive, longevity is crucial. All three of these engines are said to have a lifetime of over 300,000 miles. These models’ predecessor engines (those that have been on the road for more than a decade) have been reported to endure more than 500,000 kilometers.

What is the most reliable diesel truck engine?

The 7.3L Powerstroke is still widely regarded as one of the most dependable diesel engines ever produced. With 500 pound-feet of torque and 235 horsepower, it offers enough power for most purposes. With an air-to-air intercooler, oil-based fuelling, and long-lasting internal hard parts, it was built to last. When properly maintained, the Super Duty from 1999 to 2003 may travel much beyond 500,000 miles. If you’re looking for a secondhand 7.3L Powerstroke, you can get a fair deal on one with 150,000 to 250,000 kilometers.

Is Duramax better than Cummins?

Torque is the most important factor in hauling, but horsepower isn’t far behind. Whether you’re towing or not, more horsepower means faster acceleration. With 445 horsepower, the latest Duramax 6.6L L5P diesel dominates this category. The modern Ram Cummins 6.7L 24V diesel engines have 400 horsepower. Historically, the Duramax line has had a modest horsepower advantage over the Cummins line.

Which diesel engine lasts longest?

Because diesel pickup trucks have more durable engines that can sustain greater compression ratios, they often obtain better economy than gas trucks. Powerstroke, Cummins, and Duramax diesel vehicles often last well beyond 100,000 miles, even when used frequently for towing and hauling. As a result, diesel pickups with 200,000 or even 300,000 kilometers sometimes attract high resale values on the secondhand truck market. Drivers shopping for a used diesel pickup understand that a truck’s life isn’t over just because it has a lot of miles on it.

With modern trucks surviving longer than ever before, it’s not uncommon to come across gas trucks with 200,000-mile lifespans. Diesel trucks, on the other hand, can exceed that limit. Diesel pickup trucks may easily last 500,000 miles or more. It isn’t simply their engines that are more durable. Because diesel engines are heavier than gas engines, diesel vehicle hulls are designed and constructed to be more durable.

Not all high-mileage diesel trucks are created equal, much like other cars. For example, a diesel truck that has been used extensively for towing and transporting large loads for 100,000 miles may require serious repairs, whereas a diesel pickup that has been rarely used and has 200,000 miles on the clock may still have years of trouble-free life ahead of it. However, it’s also crucial to know that the life expectancy of a diesel vehicle is determined by a variety of other elements outside the odometer reading, such as:

For example, a 200,000-mile diesel pickup with only one or two owners and strong maintenance records is likely to be a better investment than a 100,000-mile vehicle with four owners and few records.

The general condition and appearance of the truck are also significant. A truck with a well-kept exterior and interior is likely to have had its mechanical components well-kept as well.

Duramax is a brand of diesel engine found in GMC and Chevy vehicles manufactured by General Motors. What constitutes excessive mileage for these engines is a matter of debate. Some owners consider 100,000 miles to be excessive mileage for Chevy diesel trucks, while others believe that anything less than 350,000 should be considered high mileage. A poorly maintained engine might swiftly deteriorate before reaching 100,000 miles, whereas a well-kept Duramax pickup truck should last 400,000 to 500,000 miles.

Cummins engines can be found in Dodge diesel trucks and Ram diesel trucks. Cummins diesel engines, like the Duramax, are designed to last a long time. On a Cummins diesel, 350,000 to 500,000 kilometers is normally considered high mileage. Of course, this is dependent on how well the engine is maintained.

Although maintaining the engine is crucial, some diesel pickup drivers believe it is even more important to keep the truck alive around the engine because the truck itself is less likely to last more than 500,000 miles, even if the diesel engine is well-maintained.

The Powerstroke engine, like the Duramax and Cummins engines, is found in Ford trucks and can last up to 500,000 kilometers. However, similar with the Duramax and Cummins engines, a Powerstroke engine with 350,000 to 500,000 miles on the clock is considered high mileage. The key to gaining the most miles is to keep the truck and engine in good shape. Ford vehicles are the most popular truck brand in the United States, and they’re regarded for their overall dependability.

Purchasing a diesel pickup truck with at least 250,000 kilometers could be a good deal. Diesel pickups are more expensive than their gasoline counterparts when new, so buying one used might save you a lot of money. When purchasing a used diesel truck, keep the following in mind:

Oil leaks are common in high-mileage engines, but they aren’t always cause for concern. It’s not uncommon to have small leaks around gaskets and seals. A little oil seepage around the front and rear main seals, for example, isn’t all that concerning and is even expected. Oil that is more densely coated around a seal or gasket, on the other hand, may raise suspicion. It depends on how much oil is smeared across the surface. To put it another way, while having no oil leak is definitely better, a tiny oil leak on a high-mileage diesel engine shouldn’t necessarily be a deal breaker.

When purchasing an older diesel truck with a mechanical injection system, it’s a good idea to start a diesel fuel additive routine. Long-term running without supplemental lubrication of one of these older diesel engines can result in early injection pump failure. A fuel additive, on the other hand, can improve modern diesel engines. Additives can help any diesel engine, whether it’s a high-mileage or not, get better gas mileage.

Distinct trucks and engines, like any other vehicle, have different challenges. Buying an engine model that appears to have the fewest difficulties may be irrelevant if the truck it’s in has issues. It’s also crucial to look into the individual truck’s troubles, in addition to the engine’s concerns. Maintenance records can be extremely useful in this situation.

For example, the water pump on a particular truck may fail every 100,000 miles or so. Even if a truck has 300,000 miles on it, if the water pump hasn’t been updated in 150,000 miles, you could be looking at expensive repairs.

On a high-mileage diesel truck, it’s never too late to switch to synthetic engine and gear oil. The following are some of the advantages of synthetic oil:

Heat, repetitive mechanical pressures, and chemical breakdown from fuel dilution are the major enemies of oil stability. All of these forces are more prone to higher-mileage engines. Synthetic oil can help a high-mileage diesel engine last longer and run more efficiently.

Synthetic oils, in the end, minimize friction better than traditional lubricants. Friction can increase as diesel parts wear out in high-mileage engines. More friction equals more heat, which accelerates the deterioration of oil and diesel truck parts.

To summarize, there is no single number that defines what constitutes high mileage for a diesel pickup truck; however, anything beyond 500,000 is commonly considered excessive mileage. However, remember that there are many more factors to consider when purchasing a used diesel pickup than mileage. A well-maintained, high-mileage Powerstroke, Cummins, or Duramax diesel pickup truck is almost always a better option than a poorly-maintained, heavily-used diesel pickup truck with lower mileage.

Is Cummins better than Powerstroke?

Although most diesel aficionados seem to agree that the Cummins Turbo Diesel is the more reliable engine, Ford pickups last longer and are more reliable than Ram pickups. The following are the most serious issues with these two engines:

On trucks with the CTD that do a lot of towing, the exhaust manifold issue with shrinking and cracking is most common.

The Powerstroke Diesel turbocharger issue primarily affects tuned engines, as the increased horsepower and torque causes the turbo’s ball bearings to wear out.

What is the strongest diesel engine?

The Wärtsilä RT-flex96C diesel engine is the world’s largest and most powerful diesel engine. The fourteen cylinders of the RT-flex96C, built in Finland, can produce 107,389 horsepower and more than 7,000,000Nm of torque, enough to power an entire suburban town.

Is Cummins diesel the best?

Cummins diesel engines are known all over the world for being exceptional truck engines, not only because they provide the horsepower and torque a work truck requires to carry a heavy load, but also because they are known for their unparalleled durability.

Why is Cummins better than Power Stroke and Duramax?

Pickup truck owners and buyers are frequently devoted to a single brand, and this is especially true with diesel truck buyers who purchase trucks solely on their engines. General Motors’ Duramax, Ford’s Power Stroke, and Cummins are the top three brands in the American diesel truck market.

The latter is mostly found in Fiat Chrysler’s (FCA) Ram 2500 and 3500 trucks, although its engines can also be found in Nissan’s Titan XD. FCA also owns VM Motori S.p.A., an Italian business that makes the EcoDiesel engine, a V6 with a 3.0-liter displacement that Jeep Wrangler began employing in its first diesel model a few years ago.

Is one engine superior to the other, or are there only minor differences? The best option is determined by the consumer’s needs. The following is a list of all the distinctions between these three diesel pickup truck brands.

Which Engine is Older?

Cummins was founded in 1919, and in 1988, it began supplying diesel engines to Chrysler Corporation’s Ram pickup vehicles. The GM Duramax range, on the other hand, has only been around since 2001. Since 1994, the Ford Power Stroke moniker has been in use. Even if you look past the GM and Ford engine brand names, Cummins is still older. When you compare Duramax engines to Cummins and Power Stroke engines, it’s clear that Cummins engines are the older of the two.

Which Engine Produces More Torque?

Towing is a major cause for the existence of huge, heavy-duty trucks. Torque is required for towing. Diesel engines may generate far more torque than gasoline engines. This is because their combustion process is longer and more consistent, allowing for longer connecting rods.

Due to a new fuel-injection system, the torque of the 2021 Ford F-Series Super Duty with the optional 7.3-liter 475-horsepower turbocharged V8 engine has been increased to 1050 lb.-ft (36K PSI). This is greater torque than the 6.7l Power Stroke turbodiesel engine in the 2019 Ford F-150, which produces 935 lb.-ft.

Meanwhile, the Duramax diesel engines in the 2021 Chevy Silverado HD and GMC Sierra HD are both capable of 910 lb.-ft. of torque. The 277-horsepower 3.0-liter turbodiesel engine in the 2021 GMC Yukon and Yukon XL produces only 460 ft.-lb. of torque.

The 6.7-liter Cummins turbo diesel engine in the Ram Heavy Duty, on the other hand, delivers 930 lb.-ft. of torque. The Ram 3500 Laramie, which is larger and more luxurious, produces 1,000 lb.-ft. of torque.

Apart from the smaller GMC, all of the domestic models have similar torque levels. Other elements, like as how much they weigh and how much optional equipment they must carry at all times, have an impact on performance.

What About Horsepower?

Torque is more crucial for towing than horsepower, but horsepower is equally important. Whether or not the truck is hauling anything, greater horsepower allows it to accelerate faster. You’ll welcome the extra horsepower if you need to accelerate rapidly while pulling a hefty load. Power Stroke and Duramax are fairly close in this category, with 450 for the former and 445 for the latter. Ram trucks use a Cummins engine that delivers 400 horsepower. Again, Power Stroke wins this category with the greatest horsepower, albeit by a razor-thin margin.

Towing Power

Torque and horsepower are important considerations when determining how much a truck can haul. Two other factors, though, play a role. The first is the truck’s structural design, and the second is the engine’s strength. Towing above 26,000 pounds in the United States, on the other hand, necessitates a commercial driver’s license.

The Ram Cummins and Ford Power Stroke can also tow that much, but the Duramax falls short with a total towing capacity of 23,300 pounds. The Power Stroke triumphs once more, with a total towing capacity of 34,000 pounds vs 31,210 pounds for the Ram. If you don’t have a commercial license and are looking at these stats, any of these trucks will certainly meet the needs of the average truck owner.

What is the average lifespan of a diesel engine?

For a variety of reasons, a diesel engine may be appealing to you if you’re searching for a tough, dependable vehicle. Diesel engines are engineering marvels that are recognized as some of the most dependable and long-lasting vehicles available. The longevity, endurance, and reliability of diesel engines can be attributed to three factors:

  • A diesel engine’s overall design—gear-driven, better lubrication, and less wear
  • For heavy-duty performance, diesel engines are manufactured with larger and stronger components.

You might be wondering how long a diesel engine lasts. A gasoline-powered car may normally go 200,000 miles before requiring a major maintenance or being replaced with a new vehicle. Maintenance engines, on the other hand, can run for 1,000,000-1,500,000 miles before requiring serious diesel repairs. A diesel engine can last for 30 years or longer if properly maintained.

What are some of the advantages of a diesel engine? There are several factors that contribute to reducing the cost of diesel repairs, including:

  • Diesel, which has the viscosity of light oil, is a far better lubricant than gasoline.
  • Diesel engines produce fewer emissions and corrosive chemicals due to their powerful fuel injection system and increased torque.

What’s high mileage for a diesel truck?

When it comes to mileage, according to Prosource Diesel, diesel vehicles frequently receive better mileage than gas trucks since their engines are more durable. As a result, according to Prosource Diesel, it’s not uncommon to find a used diesel truck with more than 200,000 kilometers on the odometer. There’s a good chance you’ll stumble across a used diesel vehicle with 300,000 miles on the clock.

What constitutes excessive mileage in the case of specific diesel engines? According to Prosource Diesel, a secondhand diesel truck with a Cummins or Duramax engine with more than 350,000 kilometers is considered excessive mileage. For a Powerstroke diesel engine, anything above 350,000 miles is considered high mileage.

How long will a 6.7 Powerstroke last?

After years of development, the 6.7L Power Stroke has demonstrated that it can easily surpass the 200,000-mile milestone with minimal maintenance. There’s no reason this engine can’t go 300,000 or even 400,000 miles if you follow Ford’s recommended service intervals. It’s also important to ensure that the CP4.2 high-pressure fuel pump is always fed high-quality fuel that’s free of air and impurities, and that both fuel filters are replaced at or before the recommended frequency. The most significant impediment to a 6.7L owner’s pursuit of high mileage is emissions system failure. Forced repairs to EGR valves, EGR coolers, DPF and/or SCR systems, and numerous sensors throughout the emissions-control systems can range from minor to catastrophic. There are numerous stories of this engine holding out in difficult situations, such as Texas oil fields, cross-country hot-shotters, and pipelines across North America, just like the 7.3L.