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Guest Message by DevFuse

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Silverado I4 only rated at 21 combined


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35 replies to this topic

#21 OFFLINE   rperez817

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Posted 11 October 2018 - 07:41 AM

With those ratings it's not helping CAFE much either.

 

 

Except it is doing an exceptional bad job at CAFE compliance.

 

Because GM's U.S. sales are based heavily on trucks and SUVs, the company has among the lowest overall fuel economy of any automaker. Only Ford and FCA are worse. However, GM is making some progress. Adjusted average mpg for GM increased from 22.2 in MY 2015 to 23.0 in MY 2017 (preliminary) according to EPA.

 

h5-table-2017.png

 

2.7L 4-cylinder turbo for Silverado should help GM keep improving. 21 mpg combined adjusted is pretty good for a gasoline powered full size pickup truck. The corresponding unadjusted combined mpg (what CAFE uses) should be around 26-28 mpg.

 

The light truck CAFE standard for vehicles with footprint 75 sq ft or bigger like Silverado is 25 mpg unadjusted combined from 2019-2021, 26 mpg in 2022, 27 mpg in 2023. 2.7L 4-cylinder Silverado 2WD will easily meet or exceed CAFE requirements for 2019-2022, and probably for 2023 too.

 

The big question is how popular will the 2.7L 4-cylinder turbo be with truck buyers? Full size pickup truck buyers love their V8s!


Edited by rperez817, 11 October 2018 - 07:47 AM.

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#22 OFFLINE   akirby

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Posted 11 October 2018 - 08:05 AM

Once again you missed the point in your never ending quest to defend GM.

 

They'd get a lot more bang for the buck updating or replacing the 5.3L V8.


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#23 OFFLINE   rperez817

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Posted 11 October 2018 - 08:54 AM

Once again you missed the point in your never ending quest to defend GM.

 

They'd get a lot more bang for the buck updating or replacing the 5.3L V8.

 

No sir. You mentioned that new 2019 Silverado 2.7L 4-cylinder turbo "isn't helping CAFE much". 21 mpg adjusted, 26-28 mpg unadjusted fuel economy for this truck exceeds CAFE requirement for 2019 to 2022. This helps GM with CAFE compliance. As mentioned earlier, the big question is how many of these trucks will GM sell? I think GM will get enough customers to make an impact to its CAFE numbers. Even though V8 will be much more popular.

 

GM's 5.3L V8 added DFM technology for 2019. With this engine in 2WD 2019 Silverado, fuel economy is 19 mpg adjusted and 24.6 unadjusted. This falls just short of the 25 mpg unadjusted CAFE standard for 2019-2022.


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#24 OFFLINE   akirby

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Posted 11 October 2018 - 09:53 AM

It remains to be seen if they sell enough to matter. But I guess I should have said it won’t help CAFE as much as it should have.

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#25 OFFLINE   92merc

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Posted 11 October 2018 - 02:45 PM

It remains to be seen if they sell enough to matter. But I guess I should have said it won’t help CAFE as much as it should have.

 

Well, they've won all those JD Power awards.  They must know what they're doing.  :stirpot:


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#26 OFFLINE   rperez817

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Posted 12 October 2018 - 08:52 AM

 

Well, they've won all those JD Power awards.  They must know what they're doing.  :stirpot:

 

The risk is that 2.7L 4-cylinder turbo is a completely new design. It's going into a truck that's also completely new. The last time GM launched a new generation Silverado with new engines back in 2014, there were some quality issues the first year. GM's JD Power IQS ratings for Silverado dropped before coming back up by 2015.

 

That's not to say 2.7L 4-cylinder turbo Silverado will necessarily have lots of quality problems. But keeping quality high for redesigned vehicles in their 1st year is always a challenge for automakers.


Edited by rperez817, 12 October 2018 - 08:53 AM.

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#27 OFFLINE   twintornados

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Posted 12 October 2018 - 12:06 PM

And I work at a GM dealership and the 2 I've driven got high teens. One of my former co-workers drove a 2016 and said the mileage was worse than his 2013.

 

Your're taking a sample of 2 and saying  'they all get that". It's like the liars on pickuptruck.com who say their Rams get 25+ mpg at  80mph. 

 

You have to read between the lines.

.

They only get 25MPG at 80 MPH when driven off a cliff...

 

 

No sir. You mentioned that new 2019 Silverado 2.7L 4-cylinder turbo "isn't helping CAFE much". 21 mpg adjusted, 26-28 mpg unadjusted fuel economy for this truck exceeds CAFE requirement for 2019 to 2022. This helps GM with CAFE compliance. As mentioned earlier, the big question is how many of these trucks will GM sell? I think GM will get enough customers to make an impact to its CAFE numbers. Even though V8 will be much more popular.

 

GM's 5.3L V8 added DFM technology for 2019. With this engine in 2WD 2019 Silverado, fuel economy is 19 mpg adjusted and 24.6 unadjusted. This falls just short of the 25 mpg unadjusted CAFE standard for 2019-2022.

.

Yes, but how will the alleged severe turbo lag affect sales?


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#28 OFFLINE   rperez817

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Posted 12 October 2018 - 12:41 PM


Yes, but how will the alleged severe turbo lag affect sales?

 

It might hurt sales a bit. The bigger issue is the 4-cylinder configuration of the engine. A lot of full-size pickup buyers "gotta have a V8". They may have a hard time accepting a 4-cylinder engine in a full-size pickup, even though the GM 2.7L turbo 4 delivers more power and torque than most mid level V8 truck engines from 10 years ago.


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#29 OFFLINE   twintornados

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Posted 12 October 2018 - 12:47 PM

 

It might hurt sales a bit. The bigger issue is the 4-cylinder configuration of the engine. A lot of full-size pickup buyers "gotta have a V8". They may have a hard time accepting a 4-cylinder engine in a full-size pickup, even though the GM 2.7L turbo 4 delivers more power and torque than most mid level V8 truck engines from 10 years ago.

tenor.gif?itemid=8168865


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#30 OFFLINE   Assimilator

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Posted 12 October 2018 - 02:28 PM

GM Trucks: ANYTHING but a V6!

Ford: V6 all the things!  


Edited by Assimilator, 12 October 2018 - 02:28 PM.

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#31 OFFLINE   jpd80

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Posted 13 October 2018 - 02:36 AM

 

No sir. You mentioned that new 2019 Silverado 2.7L 4-cylinder turbo "isn't helping CAFE much". 21 mpg adjusted, 26-28 mpg unadjusted fuel economy for this truck exceeds CAFE requirement for 2019 to 2022. This helps GM with CAFE compliance. As mentioned earlier, the big question is how many of these trucks will GM sell? I think GM will get enough customers to make an impact to its CAFE numbers. Even though V8 will be much more popular.

 

GM's 5.3L V8 added DFM technology for 2019. With this engine in 2WD 2019 Silverado, fuel economy is 19 mpg adjusted and 24.6 unadjusted. This falls just short of the 25 mpg unadjusted CAFE standard for 2019-2022.

Keep in mind that CAFE is calculated on highway cycle, not the combined city/highway figure.

CAFE legislation quotes the uncorrected highway figure which is about 20% higher than the

corrected highway figure on Window stickers

 

For 2019 to 2022, the corrected fuel economy required  for Silverado 1500 is 21 mpg or better.

The only versions that get worse than 21 mpg are the 6.2 4WD and the 5.3 8AT 4WD TrailBoss,

.both at 20 mpg highway.


Edited by jpd80, 13 October 2018 - 02:48 AM.

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#32 OFFLINE   jpd80

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Posted 13 October 2018 - 08:25 PM


 

 

It might hurt sales a bit. The bigger issue is the 4-cylinder configuration of the engine. A lot of full-size pickup buyers "gotta have a V8". They may have a hard time accepting a 4-cylinder engine in a full-size pickup, even though the GM 2.7L turbo 4 delivers more power and torque than most mid level V8 truck engines from 10 years ago.

Good point sir,

We only have to go back six years to before GM added DI to the V8s, the 4.8 V8 was discontinued

because there was no need to provide an engine option between the 4.3 V6 and the 5.3 V8......

 

and now, GM is trying to fill that very same gap with a 2.7 I-4T that doesn't sync with truck buyers.

 

If GM was really clever, it would have dropped the 4.3 DI and picked DI on the 4.8 V8, an engine

that would have more power and torque as well as deactivating four cylinders, not two like the V6.


Edited by jpd80, 13 October 2018 - 08:29 PM.

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#33 OFFLINE   bzcat

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Posted Yesterday, 05:31 PM

GM's design parameter for 2.7 I4 was simple, beat their lackluster 4.3 V6 in performance and EPA mileage. It seems to have done that if you compare 2019 2.7 I4 with 2018 4.3 V6, but like I said, it was an underwhelming target.

 

One thing we haven't seen yet... 2019 EPA rating for the 4.3 V6. It would be funny if it end up being the same or better than the 2.7 I4.

 

2018 Silverado 1500 RWD 4.3V6: 18/24/20

2018 Silverado 1500 RWD 5.3V8: 16/22/18

 

2019 Silverado 1500 RWD 2.7I4: 20/23/21

2019 Silverado 1500 RWD 4.3V6: ?

2019 Silvarado 1500 RWD 5.3V8: 17/23/19 (+1/+1/+1)

 

If you apply the same +1MPG that 5.3V8 observed to 4.3V6, you can see that it will beat the 2.7I4 on highway and match the combined MPG.


Edited by bzcat, Yesterday, 05:35 PM.


#34 OFFLINE   mackinaw

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Posted Yesterday, 07:43 PM

Read Richard Truett's article in Automotive News.  The title, "GM Silverado has the wrong engine."

 

http://www.autonews....o-four-cylinder



#35 OFFLINE   Fgts

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Posted Yesterday, 11:41 PM

Read Richard Truett's article in Automotive News.  The title, "GM Silverado has the wrong engine."
 
http://www.autonews....o-four-cylinder

"I'll give the four-cylinder exactly one year in the Silverado before it migrates to the Colorado"

This is the 2.7 real target, using it in the Silverado/Sierra probably increase the economy-of-scale of paying the R&D off quick while meeting CAFE for '25 for the moneymakers. I wouldn't be too surprised if the 2.7 shows in the base next-gen SUVs or even Camaro or so.

Edited by Fgts, Yesterday, 11:42 PM.


#36 OFFLINE   jpd80

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Posted Today, 02:41 AM

GM's design parameter for 2.7 I4 was simple, beat their lackluster 4.3 V6 in performance and EPA mileage. It seems to have done that if you compare 2019 2.7 I4 with 2018 4.3 V6, but like I said, it was an underwhelming target.

 

One thing we haven't seen yet... 2019 EPA rating for the 4.3 V6. It would be funny if it end up being the same or better than the 2.7 I4.

 

2018 Silverado 1500 RWD 4.3V6: 18/24/20

2018 Silverado 1500 RWD 5.3V8: 16/22/18

 

2019 Silverado 1500 RWD 2.7I4: 20/23/21

2019 Silverado 1500 RWD 4.3V6: ?

2019 Silvarado 1500 RWD 5.3V8: 17/23/19 (+1/+1/+1)

 

If you apply the same +1MPG that 5.3V8 observed to 4.3V6, you can see that it will beat the 2.7I4 on highway and match the combined MPG.

Thanks for posting those figures, they make interesting reading as most of the advantage seems to be on the city cycle.

I'm left wondering what the V6's figures might have been with an 8-speed auto, that would have been more in keeping

with buyer expectations...


Edited by jpd80, Today, 02:43 AM.









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