On the freeway, this Duramax 6.6-liter V-8 scores 17 to 19 mpg.
Which of the two 2500 diesel trucks gets the best fuel economy?
The Ram 2500’s gas V-8 engine is the greatest choice for a 2500 series truck with the best fuel economy.
This engine delivers excellent performance while saving you money at the gas station. This truck gets 16 mpg in the city and 22 mpg on the interstate, making it one of the most fuel-efficient pickups on the market.
With the current redesign of all Ram trucks, this truck not only has one of the best interiors, but also one of the coolest exteriors of any pickup.
It’s easy to see why so many people consider the Ram truck series to be one of the greatest on the market today.
Which Duramax delivers the most MPG?
Chevrolet Colorado Fuel Economy in 2021 Naturally, the 2.8L Duramax diesel obtains the best gas mileage in two-wheel-drive versions, with 23 mpg combined and an outstanding 30 mpg on the interstate.
What is the typical Duramax diesel mileage?
Because the EPA does not thoroughly evaluate vehicles, it can only estimate their real mpg on a highway trip.
For example, the Silverado 2500HD’s gas-fed 6.6 liter V8 returned 14 mpg, while the F250’s gasoline 6.2 liter V8 with six-speed automated returned 15 mpg.
In comparison, diesel Silverados got 19 miles per gallon, while Ram trucks got 25 miles per gallon.
According to EPA estimates, the 2021 Chevy Silverado has the most fuel-efficient powertrain of any diesel pickup.
When fitted with two-wheel drive, the 3.0L Duramax Turbocharged I6 engine returns 23 mpg in the city and 33 mpg on the highway, or 22/26 for four-wheel-drive models.
The Ram 1500 for 2021 is another diesel-powered pickup truck that knows how to get the most mileage out of every gallon.
According to the EPA, the 3.0-liter V6 engine can get 22 mpg in the city and 32 mpg on the highway, however adding all-wheel drive reduces these ratings by 1 mpg each, for a total 29/21 mp grating.
What is the MPG rating of a Chevy 2500 diesel?
We can only measure their real-world mpg on our 75-mph highway fuel-economy route because the EPA doesn’t test vehicles as heavy as the Silverado HD and its gigantic competition. The Silverado 2500HD with the gasoline 6.6-liter V-8 got 14 mpg on the highway in our tests. We also tested an F-250 with a gas-fed 6.2-liter V-8 and a six-speed automatic transmission, which got 15 mpg in the identical test. The diesel Silverado 2500HD, like the Ram 2500 we drove before it, got 19 mpg on the interstate.
What is the MPG rating of a 6.6 Duramax?
The 2500 level of the 2021 Sierra HD series contains a diesel engine that produces 445 horsepower and 910 pound-feet of torque. On the freeway, this Duramax 6.6-liter V-8 scores 17 to 19 mpg.
On a Duramax, how can you achieve 30 MPG?
Is it feasible to improve your Duramax truck’s fuel efficiency by using aftermarket Duramax parts? Because new diesel trucks are becoming more expensive, it’s understandable that owners would want to keep their older trucks on the road for as long as possible while still obtaining good gas mileage. It may be able to improve the performance and fuel economy of certain of your diesel truck parts.
Issues With the Fuel Lift Pump
The fuel system of Duramax diesel engines is direct injection. The fuel injection pump is one of the most significant components of this fuel system. Most Duramax engines come with a CP3 fuel injection pump, which is reliable but not extremely strong.
Because this fuel system lacks a lift pump, the injection pump must work extremely hard to both suction and pressurize the gasoline. When the engine accelerates, the lack of a fuel lift pump usually results in a loss of fuel rail pressure.
How To Fix This Lift Pump Problem
Adding an aftermarket lift pump is probably the best way to address this common Duramax issue. You may extend the life of your Duramax engine by installing a lift pump. A new lift pump boosts engine performance while lowering pollutants.
Water Pump Problems Are Common
Water pumps with plastic impellers are standard on newer Duramax engines. These impellers are flimsy and prone to breaking. Duramax engines’ water pumps are similarly prone to leaking. Engine overheating can occur as a result of these leaks. Water pump leaks can potentially impair system pressure, resulting in insufficient coolant supply.
Replacing a Duramax Water Pump
When you have a broken water pump, you should replace it straight soon. It’s a good idea to look for a water pump replacement with an iron impeller. These impeller replacements tend to last longer and function better. If your Duramax engine has a lot of miles on it, the thermostat and water pump housing may need to be replaced. This will help you avoid future problems with your cooling system.
Duramax Engines Are Notorious For Fuel Injector Problems
The original fuel injectors that these engines come with are maybe the most prevalent gripe you will hear from Duramax diesel owners. GM’s staff even confessed that its injectors were badly built and that they had been modified in recent years. One of the most serious issues with these injectors is their proclivity for cracking.
Fault ball seats are also present in these injectors. These injectors leak over time due to malfunctioning ball seats. Injector failure can result in power loss, harsh idling, and excessive smoke.
Remedying Your Injector Issues
The only method to solve this problem is to replace faulty injectors. Because these injectors are hidden beneath a variety of other engine components, it’s a good idea to have them replaced by professionals.
Is the Duramax 6.6 engine a decent engine?
Due to its absence of emissions control equipment, the LB7 remains immensely popular 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. If you’re looking to buy a used LB7, make sure it still has the original factory injectors. If it happens, you’ll need to look for a new work soon. Other serious issues with the LB7 included:
- The lack of a factory-installed lift pump
- The O-ring in the fuel filter housing is leaking.
- Failure of the head gasket
Which year of Duramax is the most dependable?
Since 2001, up to 11 different Duramax engines have been produced worldwide, according to GM Authority. They come in a variety of eight, six, and four-cylinder designs, as well as V and I configurations. As a result, there are numerous engine options to choose from.
Earlier Duramax engines were plagued by a couple of unavoidable issues that cost owners money in the long run. The following Duramax year models are recommended if you’re looking for a low-maintenance engine:
- Duramax LGH 2010-2017
- Duramax LML 2011-2016
- Duramax XLD25 2011-2021
- Duramax XLD28 2012-2021
- Duramax LWN 2014-2021
- Duramax L5P 2017-2021
- Duramax LM2 (2019-2021)
In order to comply with the new emissions laws, the Duramax engine underwent considerable upgrades in 2011. It is more reliable than its predecessors, although being more sophisticated. The Duramax model years produced from 2011 to 2021 are the safest to buy.
Duramax LGH, Duramax LML, Duramax XLD25, Duramax XLD28, Duramax LWN, Duramax L5P, and Duramax LM2 are some of these. Thanks to a diesel exhaust fluid/urea injection technology, these engines go a step farther in terms of pollution. Owners can also use exhaust after-treatments to improve fuel economy with an after-treatment system.
The only issue with these engines is that they have weak tie rods, which can fail when drag racing, off-roading, or hauling sleds. The diesel particulate filter/exhaust after-treatment system has a failure point that can cause issues.