Regular maintenance can extend the life of your diesel fuel. Switching to synthetic oil (which flows better in the winter), plugging your pickup into a block warmer for an hour or so in the morning, and maintaining proper tire pressure are all examples of these things.
How long should a diesel last?
According to studies, diesel fuel #2 becomes polluted and degrades within 28 days of being stored. Diesel fuel can only be stored for 6 to 12 months on average, while under ideal conditions it can last up to a year. In general, to extend the life of stored diesel fuel quality, it should be:
The term “diesel” is used in NFPA 110 “1.5 to 2 years of storage life.” According to the Standard, “Tanks should be sized so that gasoline is utilized within the storage life of the tank, or provisions should be provided to replace stale fuel with fresh fuel.” A-5-9, NFPA 110
Do diesels really last longer?
A gas engine would have reached the end of its life 20 years ago at about 100,000 miles, but today’s engines are constantly making another trip around the odometer. However, while gasoline engines can now reach 200,000 miles and beyond, diesel engines can also reach 500,000 miles and beyond. The following are three reasons why diesel engines survive longer than gasoline engines:
THE DESIGN OF A DIESEL ENGINE
We’ve all learned the hard way that larger isn’t necessarily better. Diesel engines, on the other hand, are designed to endure longer than their gasoline equivalents. Compression ratios and cylinder pressures are higher in diesel engines than in gasoline engines. Diesel engines are designed with these factors in mind. Their crankshaft and camshaft are larger, necessitating larger bearings and stronger main and rod bolts. Increased clearance from larger crankshafts and camshafts provides for greater oil flow. Better engine lubrication means reduced engine wear, which extends the engine’s life.
Other significant design features of the diesel engine contribute to its durability, including:
- Most diesel engines feature a gear-driven construction, which means you won’t have to worry about timing belt issues. This also saves money on costly maintenance because the timing belt does not need to be replaced.
- Piston cooling jet – Piston cooling jets spray engine oil on the bottom of your pistons in diesel engines. This engine oil spray protects pistons from premature wear by keeping them properly lubricated, which lowers friction and keeps them cool.
- There are no spark plugs in diesel engines, so the gasoline burns more slowly. Because of the slower burn, there is less stress and more torque, which is essential for diesel engine efficiency.
The fuel that diesel engines burn is another reason they survive longer than gasoline engines. Diesel fuel is a form of distillate fuel made primarily from crude oil, which allows diesel engines to wear their cylinders out more slowly than gasoline engines. This adds diesel fuel lubricating qualities, extending the engine’s total lifespan. On the contrary, gasoline is mostly composed of aromatic hydrocarbons, which function similarly to harsh and corrosive solvents. This lack of lubricity causes your engine’s components to wear out prematurely. Diesel engines have lower exhaust gas temperatures (EGTs), which contributes to their increased lifetime. Despite the fact that diesel fuel has 139,000 British thermal units (BTUs) compared to 115,000 BTUs for gasoline, the principles of thermodynamics dictate that the higher compression ratio diesel engine’s expansion rate actually cools the exhaust gases faster. The first flame front is cooler due to the lower auto-ignition temperature of roughly 410°F for diesel fuel compared to 495°F for gasoline. Diesel engines also have a substantially lower air-to-fuel ratio, ranging from 25:1 to 70:1, compared to 12:1 to 16:1 for gasoline engines. EGTs are cooled by a lower air-to-fuel ratio. In addition, gasoline burns more faster than diesel fuel. Because of the slower laminar speed of the flame during combustion in diesel engines, there is less shock to the rotating assembly, which adds to their durability.
The third factor that determines how long a diesel engine lasts is its operating efficiency. In comparison to a gas engine, diesel engines have lower revolutions per minute (RPMs) and produce more torque. The ability to create the same power at lower revolutions implies less wear on your pistons, rings, cylinder walls, bearings, valves, and guides, extending the life of your engine. When diesel engines are not in use for long periods of time, they are usually left running. The regular cycling of turning the engine on and off saves wear compared to a gasoline engine since a major percentage of wear occurs at starting. It also decreases heat cycles and maintains stable operational temperatures.
PSP Diesel in South Houston, TX, is known for their 6.0L Ford Powerstroke builds, and Stephen Peters has this to say about why diesel engines survive longer:
“Diesel users often use their engines for far more than what they were designed for. In contrast to the conventional start/stop patterns of a gasoline engine, this is typically done to generate maximum torque and run for longer periods of time during the day. They aren’t exposed to abrupt starts and stops. One of the most abrasive actions on a motor is starting it. While idling your engine is not good for its longevity, that is exactly what the majority of these trucks are doing. They run long hours and are worked very hard because they are started at the beginning of the day and shut off at the end, but that is their job.”
Peters continues, “Diesel engines are simply intended to be more durable. For example, the blocks are larger, the walls are thicker, and the pistons are larger. And, even with the extra weight, let alone the tight tolerances in the rings to avoid blow-by, the design was created with lubrication in mind, reducing friction and damage to the rubbing parts.”
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.
Do diesel or petrol engines last longer?
When deciding which car to buy, you may have to make a decision about which engine to get. So, is it going to be diesel or gasoline? Diesel engines are well-known for their superior fuel economy, and some even claim they are better for the environment. So, which is the better option? We’ll look at the advantages and disadvantages of each in this article. We’ll also address the crucial subject of whether diesel or gasoline engines endure longer.
Pros of diesel engines
- If you drive lengthy distances, they are more cost-effective. It’s not a given that diesel engines are more cost-effective. In fact, if you frequently travel short distances, such as to the store or to pick up the kids from school. Then a gasoline engine is almost probably the more cost-effective choice. However, if you regularly spend hours commuting up and down the highway. A diesel engine, on the other hand, would provide you greater mileage for your money. A typical diesel engine generates about 30% higher fuel economy than a gasoline engine.
- Diesel engines are regarded to be better for the environment because they have a higher fuel economy. Although the emissions they emit are dirtier than those produced by a gasoline engine, they can be regarded more environmentally beneficial because they provide more miles for the same amount of pollution.
They are more effective. A strong fuel injection system is used in diesel engines. This implies they’re more responsive and have more torque than their gasoline-powered equivalents.
Cons of diesel engines
- Cars that run on diesel are more expensive. If you choose to buy a diesel car, you may expect to pay an extra £2000 on top of the vehicle’s advertised price. This may render any fuel economy benefits obsolete, so keep this in mind when making your decision.
- Diesel fuel is more expensive than gasoline. While you get more miles for your money, the cost of fuel is higher, which causes some consumers to doubt the cost savings.
- Not all automobile models are available in diesel, so if you have your heart set on a specific make and model, you may be out of luck if it isn’t available.
For a long time, transportation experts have predicted that diesel automobiles will be phased out in the United Kingdom. This is because the government is under pressure to prioritize air pollution reduction. The government wants to get rid of diesel cars from Britain’s roads by 2030. They have announced a scrappage program for diesel vehicle owners, which would begin in 2017. In this blog, we discuss whether or not diesel cars will be phased out.
Pros of petrol engines
- At the pump, gasoline is less expensive than diesel. Not only that, but petrol automobiles have always been less expensive to purchase in general.
- Some people prefer a petrol car’s quiet and refined driving experience over a diesel car’s.
Are diesel cars really more environmentally friendly?
Until January 2017, the government had led the way in promoting the use of diesel automobiles, claiming that they are 20% more efficient and hence better for the environment. Diesel engines emit twice as much hazardous nitrogen dioxide as their gasoline counterparts, which had not been considered. The government reversed its position in January, claiming that diesel engines are really worse for the environment and that measures will be implemented to restrict the number of diesel automobiles on British roads. Outdoor air pollution is responsible for 40% of deaths from stroke and heart disease, and nitrogen dioxide adds to certain serious health difficulties. According to Defra, nitrogen dioxide pollution causes 4% more deaths in the UK, or roughly 23,500 additional deaths per year.
So, do diesel or petrol engines last longer?
Diesel engines are more durable than gasoline engines. Diesel is a light oil that lubricates engine parts when burned and utilized as fuel by a vehicle. The engine’s life is extended as a result of this. Petrol is a detergent that removes oil from the engine’s components, causing it to wear out faster.
A petrol engine may typically go between 250,000 and 300,000 kilometers before it begins to burn oil and wear out. A diesel engine may easily travel 500,000 kilometers and still have room to go. Most mechanics estimate that if your diesel engine is properly maintained, it will last for 30 years on the road. (Image courtesy of The Globe and Mail)
Diesel engines endure longer, but they are more expensive to maintain. This is due in part to the complicated fuel pump, which is costly to fix or replace. A diesel car’s engine filters must be changed on a regular basis, and they can cost up to £100 apiece.
Will a diesel car be cheaper to lease?
As a result of the diesel scrappage scheme, a direct correlation between engine type and lease pricing is anticipated to become increasingly widespread. The residual value of the vehicle determines the lease price. The estimated value of the car at the end of the lease contract is known as the residual value. Until recently, diesel cars had a higher residual value and were thus less expensive to lease. Because the government is attempting to diminish the popularity of diesel vehicles, it is expected that the residual value of a diesel vehicle will be lower, resulting in a larger lease payment.
Why are diesel cars more expensive to insure?
Diesel cars are typically 10-15% more expensive than their gasoline counterparts. Diesel vehicles have higher average repair costs, which affects insurance premiums. Furthermore, insurers are required to include overall replacement costs in your premiums. As diesel automobiles are more expensive to purchase, this will increase your insurance rate in the event of theft.
Because insurance must consider in the greater overall replacement cost of a diesel if it is stolen, diesel automobiles have higher average accident repair costs overall.
Choosing between a gasoline or diesel car used to be a considerably more difficult decision. However, new government laws and a forecast drop in the popularity of diesel cars over the next 25 years are causing concern. It might be a simpler choice. If you drive a lot of miles, a diesel car will still be the most cost-effective option. If you aren’t concerned about the car’s long-term resale worth. Alternatively, if you want to lease an automobile. Then diesel may still be a more cost-effective option than gasoline for you. However, if you don’t drive a lot of miles or are concerned about your car’s environmental impact, a petrol, hybrid, or electric vehicle will be the better option.
What is high mileage for diesel?
Of course, there are exceptions to every rule, but these vehicles aren’t worth the risk. If you absolutely must have a high-mileage vehicle, go for the petrol model with the largest engine.
A smaller engine will be pushed to 90% of its capacity under the same driving conditions, whereas a larger engine will cruise at 70%. Less stress equals fewer repairs.
“Is automobile age or miles more important?” I’m regularly questioned when it comes to older vehicles. When compared to a newer car, an older car always wins – which makes obvious when you think about it…
How many miles a year do you justify diesel?
Diesel is losing favor in the United Kingdom for a variety of reasons. However, if you drive 15,000 miles or more each year, a diesel automobile might be suitable for you. Because diesel is roughly 20% more efficient than gasoline, it should be cheaper to run in the long run, but only for drivers who travel large distances or frequently utilize highways.
If you reside in a city and/or drive less than 15 miles every trip, buying a gasoline is a better option. When driving a diesel automobile at low speeds, it emits the greatest pollution, and some aspects of a diesel car might become problematic if utilized wrongly.
Should I buy a diesel with 300k miles?
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 often should I change diesel engine oil?
Oil changes for diesel pickups are usually recommended every 5,000-7,000 miles or every six months on cars that pull moderately. You might be able to go much longer if you don’t tow or don’t tow very often.
Why do diesels take so much oil?
Our friend “Adept Ape,” a renowned engine builder and YouTube blogger, has posted a video delving into the different reasons why diesel engines outlast gasoline engines. Let’s have a look at the three main reasons why diesel engines are so long-lasting:
Before a significant overhaul, diesel engines are continually driven for 1,000,000 to 1,500,000 kilometers. There are three main causes for their extended lifespan:
Diesel Design and Engineering
The first reason that diesel engines outlast gasoline engines is due to the fundamental design differences between the two engines. The most evident difference between a Chevy 350 Small Block and a CAT C15 engine is size. All of the components, including the crankshaft, camshaft, and cylinder heads, are substantially larger. Diesel engines feature substantially larger bearing sizes on the inside, allowing for more oil clearance. Less wear equals more oil lubricating the parts. Diesel engines have a substantially bigger oil capacity than gasoline engines. A gas engine uses about 1 gallon of oil, but a CAT C15 uses about 15 gallons.
Diesel engines have a gearbox. There are no stretches or breaks in the timing belts or chains. The timing of the gears is never lost because they are fixed. The majority of diesel engines use gear-driven water and oil pumps. Pumps that are not driven by a gear are more likely to fail than those that are. Diesel engines just outperform gas engines when it comes to keeping the engine cool. Diesel engines contain many sensors and thermostats to ensure that the engine does not overheat if one fails. Multiple piston cooling nozzles ensure that the keepers remain cold at all times and that coolant flows continuously throughout the engine.
Diesel engines are simply made with heavy duty components that wear out less frequently, in addition to having more oil and coolant capacity. A basic yet reliable valve train is used in diesel engines. There are no hydraulic lifter failures, and the rollers are tougher and more solid than in gas engines. The camshaft lobes, lifters, and rockers are all significantly longer and built to resist more severe conditions. To make coatings on all surfaces more durable, various composite materials are used to reinforce them. The Rockwell Hardness Test is used to determine the condition of diesel engine parts.
Diesel Fuel vs. Gasoline
The diesel fuel itself is the second reason diesel engines are more durable than gasoline ones. Diesel fuel has a mild oil viscosity, which means it lubricates as it passes through the cylinder. Gasoline is more of a solvent than gasoline. Solvents are highly acidic and tend to burn away at surfaces, making them poor lubricants. The gasoline, on the other hand, will eat away at the lubricating oil that keeps the piston cylinder rings from wearing out. Simply put, diesel fuel is less volatile than gasoline. Unlike gasoline, which can be ignited with a simple spark, diesel fuel can only be ignited by compression. In terms of force on ancillary components, the chemical reaction of fire to gasoline is far more violent in the engine.
RPM Differences Between Diesel Engines and Gas Engines
The way diesel engines are used is the third and last reason why they will survive longer than gasoline engines. A diesel engine spins at 1300-1600 RPMs, whereas a gasoline engine spins at 2500-3500 RPMs. That means a gas engine makes nearly twice as many revolutions per minute as a diesel engine. This simply adds to the wear on the engine’s internal components. When the engine is warming up, it wears out around 75% of the time. Diesel engines used on the road and off the road are usually only started once or twice a day. Semi-trucks can travel for lengthy periods of time without stopping, and it’s not uncommon for them to cover 300 miles in a single trip. In a gas-powered car, the engine is started numerous times every day: once in the morning to drive to work, once for lunch, once for the bank, and so on… Because each stretch is usually just 10 miles or less, the engine is never allowed to reach maximum temperature for long periods of time. Diesel engines maintain a constant temperature throughout the day, requiring far fewer heat and cool down cycles.
All of these factors, plus more, contribute to a diesel engine lasting 1,000,000 miles or more, compared to 200,000 miles if you’re lucky with a gas engine, although each motor is different. If you maintain any engine on a regular basis and don’t let it get too hot, it will last a long time. The whole analysis from “Adept Ape” can be found in the video below: