If you have a diesel vehicle and are looking for the best engine, then this blog post is for you. We’ve analyzed what makes an engine great by taking a look at horsepower, torque, fuel efficiency, durability, and cost of ownership. With that information in mind, we present to you the 6.6L Duramax LB7 as our overall favorite diesel engine!
The LB7 Duramax was originally introduced in 2001 as GM retired its 6.5L Detroit diesel. The Duramax was superior to the outdated Detroit and marked a revolutionary turning point for Chevrolet and GMC pickups in the diesel marketplace.
The LBZ Duramax was introduced in 2004 and became the fastest-selling diesel engine of all time. It is also known as one of GM’s most reliable engines to date, with more than 500,000 sold from 2001 through 2007. The LLY Duramax followed closely behind in 2006 and will soon surpass the popularity of its predecessor.
If you’re looking for an engine that offers a lot of horsepowers, torque, fuel efficiency, durability, or value then view our table below:
Duramax LBZ 400 hp and 800 lb. ft. torque – 25% better fuel economy than any other diesel engine in the market today, durable for up to 12 years with proper maintenance $5000-$7500 on average
Duramax LLY 450 hp and 850 lb. ft. torque – 30% more powerful and efficient than its predecessor while being able to deliver a higher level of power at lower RPMs, estimated lifespan is 16 years with routine maintenance $6000-$8000 on average
There are many great engines on the market today, but if you’re looking for an engine that offers a lot of horsepower and torque while being both fuel-efficient and durable then we highly recommend selecting the Duramax LBZ or LLY.
What is the Best Duramax Engine? 1. 6.6L Duramax LB7 – Overall Best Diesel Engine. The LB7 Duramax was first introduced in 2001 when GM discontinued its 6.5L Detroit diesel. The Duramax was superior in performance to the Detroit and marked an important turning point for Chevrolet pickups and GMC trucks in the diesel market.
“I’ve owned a 02, 05, and 06 LB7. All engines were excellent to great, except for the LB7 losing injectors after 75,000 miles in Guadalajara Mexico. This car was loaded with stones and drove home 3500 miles using diesel as crankcase oil. No damage. The injectors in an LB7 can be difficult to change. The LLY got more mileage than the LB7, but the LB7 had better mileage. I’ve managed to get the LBZ to the same mileage as the LB7. LLY was quite docile until I chipped it. The power enhancements on neither the LB7 and LBZ are available for both models. All models had 4” exhaust systems. The LBZ is the quietest and gets me the most mileage. It can tow heavy loads with 19.5 tires. I have accumulated 90,000 miles on my LBZ and it has never had a problem. It pulls 18,000 trailers with tri axles, is very hard to drive, and is as reliable as it can be.
Which is better LB7 order LBZ?
The Lb7 is a bit more efficient, but it gets a lot more mileage. I have only had to replace my injectors every 140,000 miles. The LBZ has a lot of power and it is very noticeable. I have had no problems with the LBZ, although it only has 15,000mi. Both are great.
Is the LB7 a strong motor?
LB7 Duramax reliability The LB7 is a great engine when it is in stock. The block and its internals are strong enough to last for 350,000+ miles. These trucks are old enough to need repairs for most of the head gasket and injector problems.
What is it that makes the LBZ Duramax so special?
The LBZ Duramax engine was the first to be paired up with the six-speed Allison 1000 auto transmission. The new six-speed was capable of handling more power than the old five-speed. This means that they could handle about 100 horsepower more than the previous engines.
What is the Best Duramax Engine? – Similar Questions
What does LMM Duramax actually mean?
LMM Duramax is a Chevrolet Silverado HD or GM Sierra HD truck equipped with the 6.6L Duramax Diesel engine between 20075 and 2010. It was very similar to LBZ, but it featured a new emissions device, a Diesel Particulate Filter.
Which Duramax is the most reliable?
1. 6.6L Duramax LB7 – Overall Best Diesel Engine.
How many miles can LB7 travel?
The 6.6l Duramax diesel motor is a reliable choice, according to most respected organizations like the Association of Diesel Specialists. It can easily reach 350,000 miles with proper maintenance. Some users claim 400-500,000 miles.
Is the LB7 a reliable engine?
The LB7 is a reliable and efficient engine. Except for the injector’s faults, the truck will still need basic maintenance and last several hundred thousand miles.
Is the LMM Duramax a good product?
Duramax LMM reliability is Consistent with its very similar LBZ counterpart. The LMM is a highly reliable engine.
What is the difference between LMM & LBZ?
There is very little difference between the LBZ and LMM. LMM has more emissions and an intake valve. Other than that, there is little difference. Stock mine gets 18mpg, but Nicks tuning gives you an average of 21mpg. That tuning is not something I use often though.
How can you tell the differences between LMM/LML?
LMM Regen injects fuel into the engine during the exhaust stroke. LML design uses the ninth injector to inject the regen fuel directly into the exhaust. This eliminates any chance of regen fuel’ getting into the engine oil.
Is LMM better than LML?
LML is arguably a more powerful engine, but there are issues regarding DEF on all make; Ford Ram and GM. LMM emission controls have proven to be as reliable and as reliable as any. I’d choose the newer truck. But, it’s your decision.
Which Duramax engine is most reliable?
1. 6.6L Duramax LB7 – Overall Best Diesel Engine.
What does the LBZ stand for?
Life Below Zero
How long can an LMM Duramax last?
Most reliable organizations, such as the Association of Diesel Specialists would agree that the Duramax 6.6l Duramax diesel engine is one of today’s most reliable. It can easily reach 350,000 miles with proper maintenance. Some users claim 400-500,000 miles.
Which year is Duramax most reliable?
2001-2004 2500 & 33500. However, the LB7 is very reliable once the injector problem is fixed. These trucks are lighter and have an independent front suspension which makes it easier to get 20-mpg. They also offer better ride comfort and handling than their Dodge and Ford front axle counterparts.
How reliable is LMM Duramax
The LMM is a very reliable engine, which is consistent with its LBZ cousin. The PDF is a hot spot for failure so beware that you will probably end up with a few thousand dollars of PDF/emissions repairs, however, you can *illegally* remove this potential problem by removing the PDF system.
Which Duramax engine performs best?
1. 6.6L Duramax LB7 – Overall Best Diesel Engine. The LB7 Duramax LB7 was first introduced in 2001 when GM discontinued its 6.5L Detroit diesel. The Duramax was superior in performance to the Detroit and marked an important turning point for Chevrolet pickups and GMC trucks in the diesel market.