What Is High Mileage For A Duramax 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.

Is 200 000 miles alot for a Duramax?

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 can you put on a Duramax engine?

Overall, a well-maintained Duramax engine should endure for more than 300,000 kilometers. Consumers, on the other hand, report Duramax engines lasting up to 500,000 miles! However, in order to extend the life of your engine, adequate maintenance is required.

How many miles can you get out of a Duramax diesel?

The DuramaxTM 6.6L V8 Turbo Diesel Engine comes with a 100,000-mile/160,000-kilometer warranty. The DuramaxTM has been tested for up to 200,000 miles (320,000 kilometers) of travel. Within its design restrictions, the DuramaxTM powertrain is intended for reliability, peak horsepower, and torque.

What year Duramax has injector problems?

We recommend getting a service handbook if you are performing this job yourself because the method varies from model year to model year and is complex enough that we recommend purchasing a service manual.

How much does it cost to replace injectors on LB7?

Having a repair replace 8 injectors on an LB7 Duramax can cost anywhere between $4000 and $5000 CAD, depending on what else is done at the same time.

What year Duramax has injector problems?

The LB7 Duramax was produced between 2001 and 2004. Injector failure has been linked to the number 5. The good news is that the replacement injectors you buy from us come with a number of improvements to help you avoid recurrence failures.

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.

What years are the best Duramax?

Moving into Duramax’s emissions period, the LMM was nearly identical to the LBZ, with the exception of a few new emissions control systems. A diesel particulate filter (DPF), an oxidation catalyst, and a new EGR are among the devices. All three of these components have been known to fail with this engine. This engine’s fuel economy was also poorer because the exhaust treatment requires fuel to operate. The good news is that this engine performs similarly to the LBZ in terms of power and reliability.

How many MPG does a 6.6 Duramax get?

On the freeway, this Duramax 6.6-liter V-8 scores 17 to 19 mpg. In-town miles per gallon has yet to be properly tested. A six-speed automatic transmission is standard on this Sierra.

How reliable is the 6.6 Duramax?

Due to its absence of emissions control equipment, the LB7 remains immensely famous among diesel enthusiasts as the original Duramax model. In general, it’s a tough and dependable engine. As the initial models approached 100,000 miles, however, significant concerns arose. On the LB7 engines, injector failure was a typical occurrence.

Even GM noticed the issue, since the original design was later modified and the revised Duramax parts were given a 200,000-mile warranty. It’s critical to check if a used LB7 still has the original factory injectors before purchasing it. If it happens, you’ll need to look for a new work soon. Other serious issues with the LB7 included:

How long will an Allison 1000 last?

These trucks can (and do) reach 200,000 miles on a regular basis. The vehicle and drivetrain, on the other hand, will only last as long as you maintain them. Like anything else, there are pieces that fail. However, routine maintenance (fluid changes, body maintenance, and hard part care) will help you maintain a long relationship with your truck.

What is the most sought after Duramax?

The ’06-’07 Classic body type Duramax trucks are perhaps the most wanted of all Duramax variants. The LBZ Duramax has a lot going for it, with possibly the best plug-and-play horsepower potential (on top of 360 horsepower right out of the box), the last of the (essentially*) emissions-free engines, and a stronger, six-speed Allison to back them up. These trucks are still quite reliable and have the ride-friendly IFS, as well as the quiet and proven Bosch common-rail injection system. However, most models come with a significant price tag as a result of all of the aforementioned. Expect to pay around $20,000 (or more) for a low-mileage, excellent-condition variant unless you locate a bargain.

* On 2006-2007 trucks (as well as the ‘04.5-‘05.5 LLY), exhaust gas recirculation (EGR) was employed, but the diesel particulate filter and diesel oxidation catalyst were not yet available.


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