Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 06-04-2013, 11:43 AM   #1
Senior Member
Join Date: Mar 2011
Posts: 147
Genset fuel consumption

Has anyone figured out the approx. fuel usage on a 7500 diesel genset at about half load ?

expedition1 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-04-2013, 12:45 PM   #2
Senior Member
Join Date: Nov 2012
Location: bis. nd
Posts: 729
I believe mine uses about 1/2 gallon an hour..but don't know about half load could be more..

2007 Alfa Gold!! model 1008. 400hp Freightliner, IFS!!
beenthere is offline   Reply With Quote
Old 06-04-2013, 12:57 PM   #3
Senior Member
bruceisla's Avatar
Join Date: Oct 2012
Location: Tenn. - on the road again
Posts: 5,497

page 13 or thereabouts ...
2005 Newmar Essex 4502, 2013 Caddy SRX
1997 HR Endeavor 37, CAT, 1996 Geo Tracker
bruceisla is offline   Reply With Quote
Old 06-04-2013, 12:57 PM   #4
Senior Member
Sky_Boss's Avatar

Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Posts: 6,140
Per Cummins

Typical fuel consumption

No. 2 diesel fuel, Gal/hr (L/hr) No load Half load Full load

7.5 HDKAT no. 2 diesel fuel, Gal/hr (L/hr)
No load 0.21 (0.79)
Half load 0.56 (2.12)
Full Load 0.96 (3.63)

For newer models try Cummins Onan
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss is offline   Reply With Quote
Old 06-05-2013, 01:27 PM   #5
Senior Member
Country Coach Owners Club
Join Date: Jan 2006
Location: Redding
Posts: 3,521
PowerTech 7.0KW

50% load = .32 GPH

from the manual
1995 CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs
deandec is offline   Reply With Quote
Old 06-05-2013, 03:49 PM   #6
Moderator Emeritus
Gary RVRoamer's Avatar

Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,635
Half load on an Onan7500 will operate just about everything in the coach simultaneously, so rarely will consumption exceed 0.56 gal/hr. Usually much less. Mine averages around 0.3.
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 06-05-2013, 04:44 PM   #7
Senior Member
powerboatr's Avatar
Damon Owners Club
Freightliner Owners Club
Join Date: Mar 2006
Location: North East Texas
Posts: 3,746
i plan 1/2 gal per hour to gauge fuel burn of the whole coach when we are running down the road in the summer time
we most often use at least one roof a/c
and if i get the roof vents right, i can shut down the dash air.
USN Retired, Life time member of the DAV.
Enjoying the 2008 Damon Tuscany 4056, no your eyes are fine, there are really 6 slides
2016 Expedition Toad on Hauler flat bed
powerboatr is offline   Reply With Quote
Old 06-05-2013, 08:09 PM   #8
Junior Member
Join Date: Aug 2012
Posts: 18
Most of the books say approximately .5 gal an hour at half load. My experience has been far less, but half load is pulling a lot. Last year I was at an NHRA event and we ran our generator all weekend with the air and average was far less than .5 gal.

I would say Gary's estimate above at .3 is closer to what I have experienced.

JimboIndy is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:55 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.