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12-29-2011, 04:29 PM
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#1
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Junior Member
Join Date: Dec 2011
Posts: 28
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How much oil do I use?
First post, so be nice.
I have a 2011 Holiday Rambler Neptune with an ISC engine. I changed the oil last week (first time). I did not have an owers manuel at the time so I went to the Cummins web site and downloaded the ISC 360 for motorhomes brochure which stated the engine holds 6.3 gallons of oil. I received an owners manuel from Monaco three days later and the manuel stated the engine holds 19 quarts. I then drained our four quarts. After draining the four quarts, my oil stick shows to be at the add mark. According the owers manuel, the engine should still be over full. What does this thing really hold?
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12-29-2011, 04:42 PM
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#2
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Senior Member
Forest River Owners Club
Join Date: Aug 2002
Location: ...East Texas
Posts: 5,325
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My 2002 ISC 350 requires 21 qt ...several service places have over-filled it as they are used to ISCs with a 25 qt pan. I would more likely trust the info from Monaco, although it might be a good idea to do a vin search with the chassis mfg'er to verify exactly how it was configured at build. It is not unheard of to have wrong dipstick in a MH engine, which then shows an incorrect level.
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Paul (KE5LXU) ...was fulltimin', now parttimin'
2022 Coachmen Leprechaun 319MB
towing 2017 Jeep Grand Cherokee Limited
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12-29-2011, 06:11 PM
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#3
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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I buy 6 gallons, replace the filter and put in 5 gallons, start the engine, let it run a minute or so then check the dip stick and add if necessary.
Our ISC likes to run with the oil level half way between the add and full marks, if I fill it further it kicks it out the vent till it gets down some. So I jsut start there, no problems with it.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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12-29-2011, 06:24 PM
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#4
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Senior Member
Join Date: Dec 2006
Location: St. Augustine, FL
Posts: 3,595
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Our 350 ISC takes 21 qts. with a filter change.
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KIX
'02 Ultimate Advantage 40J Spartan MM - Cummins ISC
2013 Jeep Rubicon JK Unlimited
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12-29-2011, 06:36 PM
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#5
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Moderator Emeritus
Join Date: Jan 2007
Location: Litchfield Park, Arizona
Posts: 10,530
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Hi and
Best of luck getting this all sorted out. You've got a lot of expertise at your fingertips here.
Rick
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Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD
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12-30-2011, 06:33 PM
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#6
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Senior Member
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 13,599
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Hi LA RVer,
Welcome to iRV2. The answer to your question is, it all depends. The size of the oil pan makes a difference. My ISC take 24 quarts, by the Cummins book. However, it is persnickety about the amount of oil it will hold. Changing the oil and filter I add 22 quarts. This puts the oil level at the add mark on the dip stick. If I put any more in, the ISC just blows it out. If Mr. Cummins is happy at the add oil level, so am I.
What does all this mean. Add 20 quarts, run the engine a few minutes and see where you end up on the dip stick. Add oil until you are in the middle of the okay range. See if your engine likes it there. The engine will tell you where the oil level needs to be.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
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12-31-2011, 03:18 PM
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#7
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Senior Member
Join Date: Jun 2010
Posts: 125
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The only way to get it correct is to have your engine serial number in hand and call Cummins Technical Support.
They can tell you the latest recommendation for your engine.
Use the amount they tell you and calibrate the dip-stick. To calibrate add 1 or 2 quarts under the recommended amount and use a file to mark the new Add Oil mark, then finish filling and mark the dip-stick with the new Full mark.
The reasons for following this procedure are: A) The engine manufacturer bases the recommendations for proper oil amount on actual data as the engines are being used. Its not uncommon for the new recommendation to differ from the original manual. B) The chassis builder installs the engine on the chassis. The engine may be installed at an angle different than the angle anticipated/specified by the engine manufacturer. If that is the situation then the dip-stick will not give an accurate reading.
So, you make the phone-call and any diesel shop should be able to calibrate the dip-stick for you.
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01-01-2012, 07:36 PM
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#8
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Senior Member
Fleetwood Owners Club American Coach Owners Club
Join Date: Mar 2011
Posts: 6,768
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For the first oil change of any engine, I note how much old oil came out, and put in that amount of new oil...next change I know how much it will take.
__________________
2014 American Eagle 45T
DD 13, 500 HP
Pulling a Honda CRV
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01-03-2012, 06:25 AM
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#9
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Senior Member
Join Date: Jun 2010
Posts: 125
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Quote:
Originally Posted by Cat320
For the first oil change of any engine, I note how much old oil came out, and put in that amount of new oil...next change I know how much it will take.
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That works fine until the engine manufacturer changes the recommendation about how much oil to use.
Personally, I think it would be easier to make the phone call then go through the process of measuring the amount of oil drained.
YMMV,
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