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01-21-2020, 08:56 PM
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#1
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Senior Member
Join Date: Feb 2016
Posts: 858
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Looks like the new 7.3 V-8 gets the same mpg as the V-10
No need to upgrade to a newer F-53 chassis for the V-8 cause the mpg still sucks..
5.5 to 6.1 mpg while pulling a load.
https://youtu.be/qbXFrZsiAQE
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01-21-2020, 11:01 PM
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#2
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Senior Member
Monaco Owners Club Ford Super Duty Owner
Join Date: Dec 2008
Location: Kingsville TX
Posts: 1,754
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I will keep my bulletproof v10 in my class c
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01-22-2020, 09:10 AM
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#3
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Apr 2015
Location: Dallas, TX area
Posts: 634
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From this side of the street, looks like the only solution is to put smaller gas tanks in those vehicles. That way it cost less to fill up. JMHO.
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01-22-2020, 10:25 AM
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#4
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Moderator Emeritus
Ford Super Duty Owner
Join Date: Aug 2000
Location: Bryan, TX when not traveling.
Posts: 22,948
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No big surprise here. You can only push the efficiency of an engine so far and that is all. You would not expect to have more power and use less fuel.
Ken
__________________
Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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01-22-2020, 12:13 PM
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#5
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Senior Member
Join Date: Nov 2013
Posts: 5,774
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They did mention wind, should have tested both on the same day and same conditions.
__________________
2015 Tiffin Phaeton 40QBH
2018 Chevrolet Colorado Toad
Roadmaster Tow Setup
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01-22-2020, 12:14 PM
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#6
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Senior Member
Ford Super Duty Owner
Join Date: Mar 2009
Location: Oregon
Posts: 2,754
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Quote:
Originally Posted by TXiceman
No big surprise here. You can only push the efficiency of an engine so far and that is all. You would not expect to have more power and use less fuel.
Ken
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In order to do that you Must install the
Turbo3000D VADA
__________________
2016 Bounder 34T Anniversary Edition
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01-22-2020, 04:10 PM
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#7
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Senior Member
Join Date: May 2017
Posts: 1,299
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Quote:
Originally Posted by TXiceman
No big surprise here. You can only push the efficiency of an engine so far and that is all. You would not expect to have more power and use less fuel.
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Over 40 years ago, researcher found that the #1 thing that affects fuel economy is weight !
__________________
Retired. 31 year of automotive engineering for one of the Detroit 3, specializing in Powertrain Control Systems.
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01-22-2020, 04:51 PM
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#8
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Senior Member
Join Date: May 2019
Posts: 232
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Quote:
Originally Posted by jackreno
No need to upgrade to a newer F-53 chassis for the V-8 cause the mpg still sucks..
5.5 to 6.1 mpg while pulling a load.
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Unless you want/need more power. Using that power would bring the MPG down even more though.
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01-22-2020, 04:57 PM
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#9
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Senior Member
Join Date: May 2019
Posts: 232
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Quote:
Originally Posted by vettenuts
They did mention wind, should have tested both on the same day and same conditions.
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I think they went out and back to the same gas station. Wind over 66 miles round trip wouldn't change enough for this test to be tainted by wind.
Hopefully they will test both on the same day sometime, but the numbers (without comparing to anything else) speak for themselves.
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01-22-2020, 04:58 PM
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#10
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Senior Member
Join Date: May 2019
Posts: 232
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Quote:
Originally Posted by TXiceman
No big surprise here. You can only push the efficiency of an engine so far and that is all. You would not expect to have more power and use less fuel.
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In the end, it is pushing a couple of big boxes that weigh whatever through the air. Within reason, engine size won't change fuel economy too much in this regard.
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01-23-2020, 08:56 AM
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#11
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Senior Member
Join Date: Oct 2018
Posts: 232
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I don't understand why they don't turbo a smaller motor for these, it doesn't take a huge amount of HP to keeps these rolling when the roads are fairly level
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01-23-2020, 06:25 PM
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#12
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Senior Member
Join Date: Feb 2015
Posts: 380
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Basic laws of physics. You can't get anything for nothing. It takes so much energy to propel a vehicle down the road whether you use a 4 cylinder turbocharged wheezer, or a huge V-12 motor. Your results may vary. I would stick with the proven V-10 engine.
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01-23-2020, 07:02 PM
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#13
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Senior Member
Join Date: May 2006
Location: SoCal
Posts: 1,123
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Quote:
Originally Posted by jackreno
No need to upgrade to a newer F-53 chassis for the V-8 cause the mpg still sucks..
5.5 to 6.1 mpg while pulling a load.
https://youtu.be/qbXFrZsiAQE
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5.5 to 6.1 is an 11% increase. Agree it still sucks though.
__________________
2020 Grand Design Reflection 315RLTS
2019 GMC Sierra Denali Duramax
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01-23-2020, 08:10 PM
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#14
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Senior Member
Join Date: Aug 2019
Location: A beach or race track near you.
Posts: 687
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Quote:
Originally Posted by avfordguy
I will keep my bulletproof v10 in my class c
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My thoughts exactly, no advantage to the upgrade when the only thing you are likely to buy is a problem you don't know about yet. V10 does a pretty good job overall and if reliable for the most part.
Turbos on smaller engines are a big repair bill just looking for a place to occur IMO, and thanks to the Federal Government, even diesels are a pain in the neck or the lower regions now.
I bought my RV for the wife and I to relax and enjoy, not worry about when it's going to break down next. We both would like a newer model but my old one looks better and better all the time.
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