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06-19-2007, 08:11 AM
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#1
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Member
Join Date: Jul 2006
Posts: 33
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I was wondering if anyone is using Rotella 15W40 oil in their Onan? It meets all the specs and is relatively inexpensive for a good name brand oil. I know a lot of people use it for a broad range of applications including gas and diesel motors. I figure it will work well in the Arizona heat. I am using the Onan filter that I picked up from a local shop for a little over $8.
Thanks!
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2007 Weekend Warrior FSC2800 Toyhauler, 2005 Silverado 2500 HD Duramax, 2005 Yamha Rhino, 2003 Kawasaki KFX400, 2002 Yamaha FZ1
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06-19-2007, 08:11 AM
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#2
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Member
Join Date: Jul 2006
Posts: 33
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I was wondering if anyone is using Rotella 15W40 oil in their Onan? It meets all the specs and is relatively inexpensive for a good name brand oil. I know a lot of people use it for a broad range of applications including gas and diesel motors. I figure it will work well in the Arizona heat. I am using the Onan filter that I picked up from a local shop for a little over $8.
Thanks!
__________________
2007 Weekend Warrior FSC2800 Toyhauler, 2005 Silverado 2500 HD Duramax, 2005 Yamha Rhino, 2003 Kawasaki KFX400, 2002 Yamaha FZ1
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06-19-2007, 02:18 PM
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#3
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Member
Join Date: Jun 2007
Posts: 66
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I've been using the Rotella 5w40 synthetic in mine. 
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-- Warren
Winnie Sightseer 30B
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06-19-2007, 04:43 PM
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#4
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Senior Member
Workhorse Chassis Owner Texas Boomers Club
Join Date: Aug 2006
Location: McKinney, Texas
Posts: 516
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10-4 on the Rotella 5w40 synthetic - I use it in EVERYTHING that need oil.
Glenn
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2004 Safari 31SBD TREK W-20
McKinney, Texas
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06-19-2007, 05:03 PM
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#5
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Senior Member
Join Date: Nov 2006
Location: Grayson, GA
Posts: 717
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I have run the Rotella 15W40 in my Onan for over a year now. That is also what I run in the Cummins diesel that pushes the motor home. Makes it easier to carry extra oil for both. No problems with either.
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Dave and Karen
02 Ultimate Advantage36C / Cummins 350 HP ISC
07 Focus 4 Down Road Master Brake Master 4160
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06-19-2007, 06:04 PM
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#6
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Senior Member
Join Date: Feb 2007
Location: Fort Worth
Posts: 156
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Yep, I run the same Rotella in both the Cummins and the Onan for the same reason. Less oil to carry and keep up with.
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Richard, Rhonda, Ty, and Alex
1995 Newell, 470HP Detroit Diesel Series 60
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06-19-2007, 08:07 PM
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#7
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Senior Member
Texas Boomers Club Freightliner Owners Club
Join Date: Mar 2004
Location: DFW Area, TX
Posts: 1,768
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Another 15w-40 Rotella user in both Onan and Cummins 5.9. That was the oil that the dealer recommended and we've been running it since we bought the RV in Jan '04
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2000 Georgie Boy Landau 36' DP
2005 Saturn Vue toad
KF5-NJY
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06-20-2007, 08:07 PM
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#8
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Member
Join Date: Jul 2006
Posts: 33
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Yeah, I went with the 15W40 Rotella. I usually go with Mobil Delvac 1300 in my Silveradao Duramax, but the auto store I was at didn't have it. I have never heard any complaints with the Rotella, so I figured for $10/gallon I was good to go.
I also looked at the Bosch filters that I cross referenced. For some reason they did not look as long as the Onan filters. I am glad I got the Onan filters, cause they barely extend past the floor of the generator housing. Anything shorter and you would not get a wrench on it.
Out!
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2007 Weekend Warrior FSC2800 Toyhauler, 2005 Silverado 2500 HD Duramax, 2005 Yamha Rhino, 2003 Kawasaki KFX400, 2002 Yamaha FZ1
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06-21-2007, 10:14 AM
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#9
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Senior Member
Monaco Owners Club
Join Date: Jul 2005
Posts: 1,259
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I too have been using Rotella for the past 1 1/2 years in Cummins/coach & Onan/genset. No problems whatsoever.
Talked to Cummins/Onan last month at a rally, and they did recommend their specified Valvoline products, but also agreed that the Rotella was just as good.
Interesting 'survey' from folks here. Thanks.
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- - - - - - - - - - -
'06 HR Endeavor 40PAQ (Mission Hills decor). All options, but still finding more to add.
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