Go Back   EcoModder Forum > EcoModding > Hybrids
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-21-2018, 11:56 PM   #1 (permalink)
Master EcoModder
 
Join Date: May 2012
Location: Indiana
Posts: 1,521

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
Thanks: 164
Thanked 333 Times in 232 Posts
New to us, GMC Yukon Denali..... Hybrid

So, my wife has always been drawn to big SUV's, particularly the black and chrome variety . We were looking at the last generation Yukon Denali and Cadillac Escalade. Those 6.2 V8's are fun to drive but thirsty AF.

We found a hybrid Denali 4wd and pulled the trigger. On the 50 mile trip home we got a solid 22mpg indicated with 33psig in the tires and 30°f outside.

We've got a 1000 mile round trip over Thanksgiving so that should give us a real good indicator of highway mpg.

It's very odd honestly, this monster truck behaves a lot like my volt as far as how the hybrid system operates.

I won't be driving it much but I'll try to at least get the two highway tanks recorded here. Anything you want to know about it, just drop a line.

__________________





Last edited by ksa8907; 11-29-2018 at 12:46 PM.. Reason: Grammar
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-22-2018, 10:29 PM   #2 (permalink)
Master EcoModder
 
slowmover's Avatar
 
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,407

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
Thanks: 1,368
Thanked 707 Times in 535 Posts
Run it on cruise control constantly. And just below the flow of traffic. 2-3/mph below posted on less; maybe 67-68/mph.

Ideally, never change lanes. Avoid packs of vehicles by cancelling cruise until they’re away.

Your drive time won’t change enough to run faster. That’s eaten up by traffic volume problems.

Tires to recommended pressure.

Plan all stops in advance. Two hours or 100-miles apart, roughly. Have that done the night before.

Someone who sits in the Interstate left lane (illegal, only for passing, not overtaking) is doing a bad job of of driving. Risk too high. And costs go up.

When convenient, bring all factory service to date. Time, not just miles.

.
__________________
2004.0 DODGE Ram QC/LB 2500 2WD/NV-5600 305/555 ISB. 7,940-lb. Stock. 200,000 miles/5000-hrs @ 40-mph average.
1990 35' Silver Streak TT 7,900-lb.
11-cpm solo & 19-cpm towing; 21-mpg average past 54k-miles
Sold: 1983 Silver Streak 3411
  Reply With Quote
The Following User Says Thank You to slowmover For This Useful Post:
roflwaffle (06-12-2019)
Old 11-24-2018, 09:32 AM   #3 (permalink)
Master EcoModder
 
Join Date: May 2012
Location: Indiana
Posts: 1,521

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
Thanks: 164
Thanked 333 Times in 232 Posts
Well we found a treasure on our first fill up. My wife went to reset the trip computer and found that not only the previous owner but the original owner also NEVER reset the trip or the gallons used. Lifetime mpg of 19.56

I filled the tires to 40# the night before, with warmer daytime weather they were sitting about 44# during the drive. I think I'll keep the tires at 40-42 as a goal, above that the ride starts to suffer.

Also, on the drive down we seemed to settle in to 20.5 mpg at 75mph. Then we set the cruise at 78mph and also got into some pretty heavy head/cross winds probably around 20-30mph, mpg suffered to around 18.

With two kids in the back and minimal traffic, fuel economy is icing on the cake and not the primary goal.
__________________




  Reply With Quote
Old 11-24-2018, 02:39 PM   #4 (permalink)
Master EcoModder
 
slowmover's Avatar
 
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,407

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
Thanks: 1,368
Thanked 707 Times in 535 Posts
Neither was safety a goal it appears.

The police-spec Tahoe’s are heavily modified (lowered) to run those speeds.

Pickups and their SUV progeny are SOL if anything goes wrong from 60-mph+

Today’s tires and electronic stability band-aids don’t change physics.

.
__________________
2004.0 DODGE Ram QC/LB 2500 2WD/NV-5600 305/555 ISB. 7,940-lb. Stock. 200,000 miles/5000-hrs @ 40-mph average.
1990 35' Silver Streak TT 7,900-lb.
11-cpm solo & 19-cpm towing; 21-mpg average past 54k-miles
Sold: 1983 Silver Streak 3411
  Reply With Quote
Old 11-24-2018, 07:01 PM   #5 (permalink)
Master EcoModder
 
Join Date: May 2012
Location: Indiana
Posts: 1,521

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
Thanks: 164
Thanked 333 Times in 232 Posts
Quote:
Originally Posted by slowmover View Post
Neither was safety a goal it appears.

The police-spec Tahoe’s are heavily modified (lowered) to run those speeds.

Pickups and their SUV progeny are SOL if anything goes wrong from 60-mph+

Today’s tires and electronic stability band-aids don’t change physics.

.

I'll take my chances.
__________________




  Reply With Quote
Old 11-24-2018, 07:18 PM   #6 (permalink)
Master EcoModder
 
Join Date: May 2012
Location: Indiana
Posts: 1,521

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
Thanks: 164
Thanked 333 Times in 232 Posts
In other news: I can confirm that higher speeds definitely reduce your mpg's.....

I'm really curious what slower speeds will provide. Tooling around town tonight we got about 23 to 24 so this hybrid platform is definitely capable of significantly better mpg than the non hybrids. Even touching non-hybrid v6 sedan territory.
__________________





Last edited by ksa8907; 11-24-2018 at 10:57 PM..
  Reply With Quote
Old 11-25-2018, 01:35 AM   #7 (permalink)
EcoModding Lurker
 
Join Date: Jan 2013
Location: Texas
Posts: 7
Thanks: 0
Thanked 3 Times in 1 Post
23+ mpg City from a 6L V8 hybrid?

That is better than I thought

@Slowmover: Correct me if I'm wrong, but I think the Police Spec Tahoe and the Tahoe Hybrid have a similar (re: lower) ride height
  Reply With Quote
Old 11-25-2018, 08:28 PM   #8 (permalink)
Master EcoModder
 
Join Date: Jan 2009
Location: USA
Posts: 257

Winsight - '06 Honda Insight
Gen-1 Insights
90 day: 78.42 mpg (US)
Thanks: 235
Thanked 82 Times in 58 Posts
I've found these interesting for a while now and wondered how hard it would be to get 30+mpg highway.
__________________
  Reply With Quote
Old 11-25-2018, 10:01 PM   #9 (permalink)
Master EcoModder
 
Join Date: May 2012
Location: Indiana
Posts: 1,521

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
Thanks: 164
Thanked 333 Times in 232 Posts
Quote:
Originally Posted by fusion210 View Post
I've found these interesting for a while now and wondered how hard it would be to get 30+mpg highway.
I would say that's not gonna happen. I found it can cruise around 40-60 mph at about 28mpg +/- 10%.

It does seem to happily drop out of v4 mode and run all 8 cylinders with relatively little demand.
__________________




  Reply With Quote
Old 11-25-2018, 10:03 PM   #10 (permalink)
Master EcoModder
 
Join Date: May 2012
Location: Indiana
Posts: 1,521

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
Thanks: 164
Thanked 333 Times in 232 Posts
Quote:
Originally Posted by ModNewb View Post
23+ mpg City from a 6L V8 hybrid?

That is better than I thought

@Slowmover: Correct me if I'm wrong, but I think the Police Spec Tahoe and the Tahoe Hybrid have a similar (re: lower) ride height
These were fairly ideal conditions. About 55°f outside, speeds under 45mph, fully warmed up engine and transmission (driven 150 miles just a couple hours earlier).

__________________




  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com