6.2L or Duramax reliability

[DuraYuk]

Oh my god, where do you get this nonsense? What is 4500 rpm on a gasoline engine? Here is a photo of towing the Yukon 1500-1600 rpm, it pulls the boat perfectly. You will get 25 miles per gallon with a trailer only if you drive 40-45 miles per hour on a flat track. Please don't fantasize

On flat ground sure. When you need power it's reving up. Im getting max torque at 1500 rpm. Not the case with a gas engine. Even high displacement ones still need to rev high to make power to move. No comparison.

Chart for gas: max torque 4250 rpm https://www.automobile-catalog.com/curve/2021/2970635/chevrolet_tahoe_6_2l_v8_4wd.html#gsc.tab=0

Chart for diesel: max torque 1500rpm https://www.dieselhub.com/duramax/3.0-duramax-lm2.html

 

[Vladimir2306]

On flat ground sure. When you need power it's reving up. Im getting max torque at 1500 rpm. Not the case with a gas engine. Even high displacement ones still need to rev high to make power to move.

Chart for gas: max torque 4250 rpm https://www.automobile-catalog.com/curve/2021/2970635/chevrolet_tahoe_6_2l_v8_4wd.html#gsc.tab=0

Chart for diesel: max torque 1500rpm https://www.dieselhub.com/duramax/3.0-duramax-lm2.html

Aaaa... Again, some kind of nonsense ... Do you really drive??? Who presses the gas pedal completely when towing a trailer???? When towing a trailer, acceleration is always as soft and calm as possible. No kick down. And the 6.2 provides acceleration with a trailer without going beyond 2000-2500 rpm without any problems

 

[DuraYuk]

Aaaa... Again, some kind of nonsense ... Do you really drive??? Who presses the gas pedal completely when towing a trailer???? When towing a trailer, acceleration is always as soft and calm as possible. No kick down. And the 6.2 provides acceleration with a trailer without going beyond 2000-2500 rpm without any problems

appreciate the discussion. You missed the point. I get all my juice at 1500 rpm. The v8 in your vehicle doesn't until 4500 rpm..if you need all the juice you need to rev to get it. That's it. You made your choice. It works for you but for many of us it doesn't.

There's things the 6.2 does well. It has more power. It's quicker.

There's things the lm2 does well. Better mpg. More torque lower in rpm. Tows better etc.

Just how it is.

 

[Vladimir2306]

appreciate the discussion. You missed the point. I get all my juice at 1500 rpm. The v8 in your vehicle doesn't until 4500 rpm..if you need all the juice you need to rev to get it. That's it. You made your choice. It works for you but for many of us it doesn't.

There's things the 6.2 does well. It has more power. It's quicker.

There's things the lm2 does well. Better mpg. More torque lower in rpm. Tows better etc.

Just how it is.

Again, blah blah blah ... Why do you need all the power of the engine?) to tear the trailer apart?))) You lose the thread of the conversation, you are constantly trying to take it aside. About miles per gallon, I showed you clearly that I can easily get the same figures at 6,2 ..you have only words and words all the time .. No photos or evidence)))

 

[DuraYuk]

Again, blah blah blah ... Why do you need all the power of the engine?) to tear the trailer apart?))) You lose the thread of the conversation, you are constantly trying to take it aside. About miles per gallon, I showed you clearly that I can easily get the same figures at 6,2 ..you have only words and words all the time .. No photos or evidence)))

Lol.

 

[TollKeeper]

What a way to derail a thread guys. This isnt even constructive at this point, its just D|CK swinging.

Let it go...

 

[dc968]

Well, as it were, the 3-liter diesel format is not new to the world)) This form factor has long been known on Volkswagen Group, BMW, Mercedes, Land Pover cars. He stands in a lot of places, he walks great, or rather walked, until they began to fasten DEF systems to him, like in the USA or AdBlue, like in Europe. And since then, problems have begun with these motors .... Mercedes 350d goes up to 100 thousand km without serious problems, BMW has the same story. I sincerely do not understand why diesel engines were transferred to passenger cars for private use. Their fate is a commercial vehicle, not a city car for mommy. It is heavier, it is more expensive, it requires care, it is more expensive to maintain, and the constant race to reduce emissions makes diesel uneconomical in principle.

I have a 2014 A6 TDI w/over 100k miles and it runs like a train w/no issues on the emissions side in 10 years. As for why diesels were transferred to passenger cars, you can thank government functionaries who decided to impose onerous taxes on gasoline engines based on displacement.

 

[Polo08816]

What a way to derail a thread guys. This isnt even constructive at this point, its just D|CK swinging.

Let it go...

A certain someone has to get the last word in.

 

[Vladimir2306]

I have a 2014 A6 TDI w/over 100k miles and it runs like a train w/no issues on the emissions side in 10 years. As for why diesels were transferred to passenger cars, you can thank government functionaries who decided to impose onerous taxes on gasoline engines based on displacement.

My father had a 2012 Audi A6 3.0tfsi. This gun pulled over the entire range from 0 to 240 km / h)))
In the United States, gasoline engines have been taxed?

 

[NothEastTahoe]

Let me bring it back with some more fun.

I just got a 6.2, and the dealer said I don't need premium, but everything I have read and seen says I need to use 93 gas if possible. We have it all over here so I would.

To be honest I am going to do it no matter what as I don't like using lower grade fuels regardless. But why would the dealer tell me no and don't worry about it?

I like them, trust them and they were a low pressure easy sale. So I was confused when he told me I didn't need to do it, or even really suggest I do.

 

[DuraYuk]

Let me bring it back with some more fun.

I just got a 6.2, and the dealer said I don't need premium, but everything I have read and seen says I need to use 93 gas if possible. We have it all over here so I would.

To be honest I am going to do it no matter what as I don't like using lower grade fuels regardless. But why would the dealer tell me no and don't worry about it?

I like them, trust them and they were a low pressure easy sale. So I was confused when he told me I didn't need to do it, or even really suggest I do.

owners manual says premium recommended for max performance....not premium required. http://car-owners-manual.com/chevro...nd-operating/recommended-fuel-6-2l-v8-engine/

As for premium gas vs low tier it's just the anti knock agents that are different. I wouldn't say the gas is better quality. So if a car requires it it's necessary so it doesn't knock (high compression motors etc).

Is Premium Gas Worth It? We Test High Octane on 4 Popular Vehicles

We tested higher octane fuel than manufacturers require on the Honda CR-V, BMW M5, Ford F-150, and Dodge Charger to see if it impacted acceleration or MPG.

www.caranddriver.com

 

[NothEastTahoe]

owners manual says premium recommended for max performance....not premium required. http://car-owners-manual.com/chevro...nd-operating/recommended-fuel-6-2l-v8-engine/

As for premium gas vs low tier it's just the anti knock agents that are different. I wouldn't say the gas is better quality. So if a car requires it it's necessary so it doesn't knock (high compression motors etc).

Is Premium Gas Worth It? We Test High Octane on 4 Popular Vehicles

We tested higher octane fuel than manufacturers require on the Honda CR-V, BMW M5, Ford F-150, and Dodge Charger to see if it impacted acceleration or MPG.

www.caranddriver.com

Thanks for differentiating between with knock agent link. And obviously I am in it for max performance!

 

[Polo08816]

 

[TollKeeper]

I have to admit, I didnt know it was a wet belt! Ford has not been having very good luck with them, so why would GM have any better luck?

 

[Polo08816]

I have to admit, I didnt know it was a wet belt! Ford has not been having very good luck with them, so why would GM have any better luck?

You're referring to the belts on the 5.0 Coyote? I think the 3.5EBs have timing chains. Although both of their designs have the belt/chain on the front of the engine instead of behind.

150,000-200,000 service interval is not bad though - you likely only have to do it once at most for the life of the vehicle.

 

[DuraYuk]

So at 115k there was virtually no wear.
It will probably last over 200k. That's why gm modified the service interval.

The big boogeyman regarding the lm2 doesn't exist. Cool.

 

[WalleyeMikeIII]

Again, blah blah blah ... Why do you need all the power of the engine?) to tear the trailer apart?))) You lose the thread of the conversation, you are constantly trying to take it aside. About miles per gallon, I showed you clearly that I can easily get the same figures at 6,2 ..you have only words and words all the time .. No photos or evidence)))

Dura Yuk is correct about this one...as it relates to torque.

To tow you need torque, esp when going uphill. Diesels are at max torque at the low range of their RPM's, for a gasser, you usually have to get up in the RPM's to get the max torque...so, in those cases, the automakers usually tune the shift points in the transmission controls accordingly.

Suggest doing a YouTube search for TLF Truck "IKE Gauntlet"

Those guys tow at max load up a very steep mountain grade, and do it with most all of the powertrains available in most brands of trucks.
They tested both the 3.0 Duramax and the 6.2L in both GM Pickups and in the SUV (not sure if they did the duramax in the Suburban/Yukon) or not. They measure MPG, engine braking, noise, the whole gamut....it is very enlightening.

Diesel will almost always win in a towing competition, and a fuel economy competition; because the characteristics of the engine deliver peak torque sooner, and because diesel fuel has a higher energy density than gas.

The gas engine will put way more smiles on your face if what you like is acceleration. Both have their purpose...and it is personal preference and application as to which works best for a given user. This is why GM offered a choice in the powertrain.

I drag my 4500lb boat trailer all over the place (before was w/ a 5.3L in my 2013 suburban, usually to the tune of 12-13MPG, and now w/ my 6.2L Denali, usually to the tune of about 16MPG) we have hills and such around here, and some interstates I drive on w/ the boat I need to be at 70-71MPH to not get blown off the road by other traffic. I suspect the 3.0 duramax would do a little better than the 16MPG, and know it would be great when not towing...I chose the gas for the fun factor...and I am not disappointed. If my lifters blow out my valvetrain, I'm blessed becuase my dealer "included" a lifetime powertrain warranty...so aside from some downtime, I'll be whole in the pocketbook.

 

[Polo08816]

Dura Yuk is correct about this one...as it relates to torque.

To tow you need torque, esp when going uphill. Diesels are at max torque at the low range of their RPM's, for a gasser, you usually have to get up in the RPM's to get the max torque...so, in those cases, the automakers usually tune the shift points in the transmission controls accordingly.

Suggest doing a YouTube search for TLF Truck "IKE Gauntlet"

Those guys tow at max load up a very steep mountain grade, and do it with most all of the powertrains available in most brands of trucks.
They tested both the 3.0 Duramax and the 6.2L in both GM Pickups and in the SUV (not sure if they did the duramax in the Suburban/Yukon) or not. They measure MPG, engine braking, noise, the whole gamut....it is very enlightening.

Diesel will almost always win in a towing competition, and a fuel economy competition; because the characteristics of the engine deliver peak torque sooner, and because diesel fuel has a higher energy density than gas.

The gas engine will put way more smiles on your face if what you like is acceleration. Both have their purpose...and it is personal preference and application as to which works best for a given user. This is why GM offered a choice in the powertrain.

I drag my 4500lb boat trailer all over the place (before was w/ a 5.3L in my 2013 suburban, usually to the tune of 12-13MPG, and now w/ my 6.2L Denali, usually to the tune of about 16MPG) we have hills and such around here, and some interstates I drive on w/ the boat I need to be at 70-71MPH to not get blown off the road by other traffic. I suspect the 3.0 duramax would do a little better than the 16MPG, and know it would be great when not towing...I chose the gas for the fun factor...and I am not disappointed. If my lifters blow out my valvetrain, I'm blessed becuase my dealer "included" a lifetime powertrain warranty...so aside from some downtime, I'll be whole in the pocketbook.

The 2 reasons why diesel powertrains are preferred for towing heavy are 1. fuel economy and 2. exhaust braking capabilities for going down grades.

You don't need "torque" to tow and go uphill - you need power. However, engines that tend to be more fuel efficient in a towing application tend to have high torque because of the frictional losses at high RPM.

Automakers could theoretically develop a big block NA V8 to provide as much or more power than a diesel like the L5P Gen 2. The problem is that for applications that need that amount of power also need the exhaust braking capabilities for slowing that load down.

 

[WalleyeMikeIII]

The 2 reasons why diesel powertrains are preferred for towing heavy are 1. fuel economy and 2. exhaust braking capabilities for going down grades.

You don't need "torque" to tow and go uphill - you need power. However, engines that tend to be more fuel efficient in a towing application tend to have high torque because of the frictional losses at high RPM.

Automakers could theoretically develop a big block NA V8 to provide as much or more power than a diesel like the L5P Gen 2. The problem is that for applications that need that amount of power also need the exhaust braking capabilities for slowing that load down.

That makes good sense! Note, the TFL guys did note that the exhaust braking on the 3.0 Duramax is not nearly as good as on the bigger ones (makes total sense).

 

[Polo08816]

That makes good sense! Note, the TFL guys did note that the exhaust braking on the 3.0 Duramax is not nearly as good as on the bigger ones (makes total sense).

So the Youtube Channel - TheGettyAdventures - made a good video why the LM2 and LZ0 are much better than their Stellantis and Ford counterparts:

They were designed with emissions requirements in mind versus the other diesel powertrains that had to add emissions components afterwards.