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Re: Gas vs Diesel
[Re: whnigt]
#12501019
11/12/17 03:18 PM
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Joined: Apr 2015
Posts: 51
diesel_Power_House
Outdoorsman
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Outdoorsman
Joined: Apr 2015
Posts: 51 |
I’m getting 16-18 out of my 05 suburban Z71 with a 5.3 gasser
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Re: Gas vs Diesel
[Re: whnigt]
#12501155
11/12/17 06:08 PM
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Joined: Aug 2013
Posts: 4,712
Txmedic033
TFF Team Angler
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TFF Team Angler
Joined: Aug 2013
Posts: 4,712 |
I'm getting 19 average with my 2010 6.7L Cummins. 23 mpg at 70 MPH.
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Re: Gas vs Diesel
[Re: whnigt]
#12501235
11/12/17 07:45 PM
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Joined: Apr 2015
Posts: 51
diesel_Power_House
Outdoorsman
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Outdoorsman
Joined: Apr 2015
Posts: 51 |
But, I plan on swapping in an LBZ duramax and Allison 1000 (6speed) combo, NP263HD transfer case, and the rest of the 3/4 ton running gear with a Dana 60 straight axle steer axle under my suburban. That should net me a 3-5 more MPG gain.
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Re: Gas vs Diesel
[Re: Txmedic033]
#12501306
11/12/17 09:06 PM
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Joined: Dec 2008
Posts: 7,752
Samsonsworld
TFF Celebrity
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TFF Celebrity
Joined: Dec 2008
Posts: 7,752 |
I'm getting 19 average with my 2010 6.7L Cummins. 23 mpg at 70 MPH. I have a little seat time with a 6.7l 4x4 crew. Never saw those numbers.
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Re: Gas vs Diesel
[Re: diesel_Power_House]
#12501311
11/12/17 09:10 PM
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Joined: Dec 2008
Posts: 7,752
Samsonsworld
TFF Celebrity
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TFF Celebrity
Joined: Dec 2008
Posts: 7,752 |
I’m getting 16-18 out of my 05 suburban Z71 with a 5.3 gasser Averaged 15 on a good tank in my 2010 suburban 4x4. Not talking hwy mpgs.
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Re: Gas vs Diesel
[Re: whnigt]
#12507306
11/18/17 12:43 AM
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Joined: Dec 2008
Posts: 7,752
Samsonsworld
TFF Celebrity
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TFF Celebrity
Joined: Dec 2008
Posts: 7,752 |
Little disappointed towing with the f250. The Ecoboost is just hard to beat. It digs deep and lugs things out. The 6.2l is quick to downshift and spends WAY too much time in 3rd at 4k rpms. It does tow straight. Feels solid and the brakes are first rate. Just feels underpowered for a 10k trailer
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Re: Gas vs Diesel
[Re: whnigt]
#12507389
11/18/17 01:39 AM
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Joined: Jul 2012
Posts: 12,214
Cast
TFF Guru
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TFF Guru
Joined: Jul 2012
Posts: 12,214 |
I just got to my destination after towing a heavy trailer down I45 with my F250 Superduty diesel (6.7 bypassed and tuned). I couldn’t maintain my usual high speed required on 45 but I did manage to cruise at 80 and it did it well. My average mpg dropped from 17.5 to 17.3.
Cast I have a short attention spa
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Re: Gas vs Diesel
[Re: whnigt]
#12508678
11/19/17 01:49 AM
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Joined: Dec 2008
Posts: 7,752
Samsonsworld
TFF Celebrity
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TFF Celebrity
Joined: Dec 2008
Posts: 7,752 |
Towing heavy, 80 mph, 17mpg.....sure.
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Re: Gas vs Diesel
[Re: Samsonsworld]
#12508799
11/19/17 03:17 AM
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Joined: Jul 2012
Posts: 12,214
Cast
TFF Guru
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TFF Guru
Joined: Jul 2012
Posts: 12,214 |
Towing heavy, 80 mph, 17mpg.....sure. . Hey! I’m just telling you what it said. It’s a long term average. I still burned the whole way on a single tank.
Cast I have a short attention spa
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Re: Gas vs Diesel
[Re: whnigt]
#12516780
11/26/17 05:52 PM
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Joined: Dec 2008
Posts: 7,752
Samsonsworld
TFF Celebrity
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TFF Celebrity
Joined: Dec 2008
Posts: 7,752 |
Just caught you didn't reset.
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Re: Gas vs Diesel
[Re: whnigt]
#12517722
11/27/17 03:31 PM
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Joined: Jan 2005
Posts: 7,491
redchevy
TFF Celebrity
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TFF Celebrity
Joined: Jan 2005
Posts: 7,491 |
Did you get the 3.73 gears? That is a common complaint with them, most I talk to say if your going to tow with it you want the 4:30'S.
I would be ok with it grabbing for gears, at least its trying to get to an rpm it can do what your asking of it at. My biggest complaint with my last few GM gas trucks was they just didn't want to downshift, always tried lugging itself till it just couldn't.
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Re: Gas vs Diesel
[Re: whnigt]
#12518051
11/27/17 07:54 PM
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Joined: Dec 2008
Posts: 7,752
Samsonsworld
TFF Celebrity
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TFF Celebrity
Joined: Dec 2008
Posts: 7,752 |
Yes, 3.73. I'm still learning a few things. If I lock out 5th, it's a lot less likely to drop to 3rd. Otherwise it seems to bypass 4th. And towing in 4th or 5th isn't too bad but 3rd.... the engine is friggen loud!
Averaged around 7 mpgs over 360 miles. Not much different economy. Love love love having brakes.
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Re: Gas vs Diesel
[Re: whnigt]
#12518760
11/28/17 03:00 PM
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Joined: Jan 2005
Posts: 7,491
redchevy
TFF Celebrity
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TFF Celebrity
Joined: Jan 2005
Posts: 7,491 |
I always hated that with my GM 5.3 if you gave it a lot of pedal it would drop straight from 6th to 3rd, nice if your were wanting all it had, but an annoyance most of the time.
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