How Long Will A Dodge Cummins Diesel Engine Last?

Cummins engines are one of the most common diesel pickup truck engines. If you’re thinking about buying a new or used truck with a Cummins engine, you should find out how long it’s expected to survive. To find out for you, we looked through forums and the Cummins website.

The Cummins brand is known for its dependability and long-lasting engines. The 5.9-liter engine should last between 300,000 and 400,000 miles. With no modifications and adequate maintenance, the 6.7-liter engine costs around 350,000 dollars.

Diesel engines are designed to be powerful and provide a lot of power. You’ll be able to haul more, achieve better fuel economy, and have peace of mind. We’ll go over the differences between the 5.9L and 6.7L Cummins engines, as well as why Cummins engines are so popular.

How many miles can a Cummins diesel last?

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.

How many miles will a 6.7 Cummins Diesel last?

Do you want to know how many miles a 6.7 Cummins gets on average? Perhaps you’re looking for a pre-owned Ram truck? Is a used 6.7 Cummins with over 200 miles still considered safe?

The Cummins 6.7 engine, according to Ram, is guaranteed for 350,000 kilometers. The mileage is guaranteed if all scheduled services are completed on time and the engine has not been modified for performance.

These engines are regarded as one of the three most reliable engines ever created, and they are frequently compared to competitors such as Isuzu Motors’ Duramax and Ford’s Powerstroke engines. A detailed oil examination is recommended if you want to determine the general condition of the engine before acquiring a used truck with this mileage.

Without requiring any considerable engine work, this will be able to provide particular clues regarding engine wear rate. You can determine the quantity of pollution and overall engine health by evaluating a sample of used engine oil.

Let’s take a look at some of the high-mileage components that will need to be inspected as the big 6.7 Cummins hits hundreds of thousands of miles.

Is the 6.7 Cummins a million mile engine?

The 6.7L Cummins had a lot to live up to when it first arrived on the scene for the 2007 Dodge Rams. After all, the 5.9L it replaced was known for its million-mile durability, enormous performance potential, and never-ending supply of aftermarket parts and service. Fortunately, almost 40% of the 6.7L’s internals were carried over from the 5.9L, and the injection system was practically unchanged.

From 2003 to 2007, the common-rail 5.9L Cummins was available with a fixed-geometry turbo. By the end of its run, it had 325 horsepower and 610 pound-feet of torque, as well as 359 cubic inches of displacement from a bore of 4.02 inches and a stroke of 4.72 inches. With 350 horsepower and 650 lb-ft of torque, the 6.7L Cummins began production for the 2007.5 model year Ram vehicles. It had a bore of 4.21 in and a stroke of 4.88 in, with a displacement of 408.2 ci with a variable geometry turbo.

The 6.7L, on the other hand, would be saddled with the full suite of emissions control devices, which 5.9L owners were completely unaware of. Exhaust gas recirculation (EGR) and a diesel particulate filter were standard on the brand new 6.7L Cummins (DPF). Selective catalytic reduction (SCR) would be introduced to the mix on 2013 model year Rams, requiring the use of diesel exhaust fluid (DEF) as part of the exhaust after treatment system to reduce NOx emissions.

Now it’s time for the trade-offs to begin! Fuel economy and general reliability are considerably poorer on 6.7L-equipped trucks due to the aforementioned pollution control components. The 6.7L’s variable geometry turbocharger, on the other hand, making it much more responsive at low rpm than the 5.9L, not to mention that it has a highly effective exhaust brake function. The 6.7L’s greater displacement also aids in the production of significantly more torque, which is perfect for truck owners who spend a lot of time towing a trailer.

While many people still feel the 5.9L is the be-all and end-all Cummins, many others have accepted that the 6.7L is essentially a bigger, better version of the 5.9L. Is the 6.7L, however, the superior engine? To try to reconcile this 50/50 divide, we’ve listed the strengths and weaknesses of each engine below.

*FYI: Because there were so many different variants of the 5.9L engine (12-valve with mechanical injection, 24-valve with electric-over-mechanical injection, and 24-valve with common-rail injection), we’re focusing on the 24-valve, common-rail version produced from 2003 to 2007.

Are Cummins diesel engines reliable?

When it comes to diesel engines and trucks, one name comes to mind almost immediately: Cummins. Cummins diesel trucks, or trucks powered by Cummins engines, are commonly considered as the best in the industry, and rightfully so. Cummins Inc., the business behind Cummins engines, is dedicated to developing powerful, long-lasting engines for industrial applications. They’re dependable and balanced, with all the features you’d expect from a diesel industrial engine. Cummins is synonymous with heavy-duty, dependable diesel engines for many people. We’ll take a deeper look at Cummins diesel vehicles to see why drivers who are familiar with diesel trucks adore them.

Should I buy a diesel with 200k miles?

Diesel trucks, on the whole, are sold with higher mileage than the average used vehicle. It’s not unusual to come across a used diesel truck for sale with more than 200,000 kilometers on it. Although diesel engines are generally more reliable than gasoline engines, excessive mileage remains an issue.

Is 300k miles alot for a diesel?

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 many miles will a Ram 2500 Cummins last?

The short answer to how long the Dodge Ram 2500 lasts is as follows: With regular maintenance and judicious use, the Dodge Ram 2500 may last between 250,000 and 300,000 kilometers. The average yearly mileage of normal drivers is 15,000 miles per year, implying a lifespan of 15-20 years or probably longer.

Is the Cummins 6.7 a good engine?

The 6.7L Cummins engine in the Dodge Ram ISB is a powerful diesel engine. It was the first light-duty vehicle to reach 1,000 pound-feet of torque, with the 6.7 Power Stroke following close behind. There’s little doubt that the 6.7 diesel engine has enough power and torque to satisfy practically any driver. However, no engine is flawless, and the Cummins 6.7 is no exception.

It’s largely emissions equipment that reduces the engine’s power. On the 6.7 Cummins, as well as many other modern diesels, EGR and DPF issues are frequent. The 6.7L engine’s high torque can cause problems with the head gaskets failing. Turbo difficulties are conceivable with increasing mileage because they are subjected to a lot of abuse. Fuel dilution is another concern that might arise, however doing an oil study on a regular basis can assist to limit the hazards of dilution.

Overall, Dodge and Ram trucks with the 6.7 Cummins engine are dependable. Sure, it lacks the legendary status of previous diesels such as the 7.3 PS or 5.9 Cummins. Unfortunately, modern-day emissions parts work against reliability in a variety of ways. However, if the 6.7 Cummins is adequately maintained, it should easily exceed 250,000 miles.

Is the Ram 2500 Cummins reliable?

RepairPal gave the Ram 2500 an average reliability rating of 2.5 out of 5.0. It also came in 10th place out of 17 trucks in the same class. Although the 2500 is a good vehicle for physical labor, it can be costly to own. Its annual repair and maintenance costs are estimated to be roughly $1,070. Proper maintenance, on the other hand, can help your 2500 survive a long time, with a life lifetime ranging from 250,000 to 300,000 miles (about 15 to over 20 years).

What year Cummins is most reliable?

Buyers agree that the classic Dodge Ram is the best of the diesel truck variants. Rams have been the preferred truck of diesel drivers since the 1980s, because to their dependable Cummins engine and power. Over the last 50 years, the vehicle has seen numerous alterations, with some years being better than others.

1996-1998, 2006-2007, and 2010-2011 are the finest years for Dodge diesel trucks. Among Dodge diesel trucks, these years have the fewest complaints and the most capabilities. These trucks receive rave evaluations from owners for their hauling capability and dependability.

A thorough review of their benefits and cons is required to understand why these years are the best among so many makes of Dodge diesel engines. Let’s take a look at what the best years in history have to offer.