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07-31-2011, 11:19 PM
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#1
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Member
Join Date: Nov 2010
Posts: 61
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New to me 2003 Excursion with 7.3 diesel. Time for first oil change. In everybody's opinion what is the best oil to use for the 7.3?
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07-31-2011, 11:34 PM
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#2
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 4,925
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My only response is to read this link. Personally I use Shell Rotella, but any oil rated for diesel engines ( see chart) meets your engine mfgrs. requirements.
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"As nightfall does not come at once, neither does oppression. In both instances there is a twilight where everything remains seemingly unchanged. And it is in such twilight that we all must be aware of change in the air - however slight - lest we bec
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08-01-2011, 12:00 AM
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#3
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Senior Member
Appalachian Campers
Join Date: Jan 2007
Location: Home based in Marion County, Tennessee
Posts: 640
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Shell Rotella or Motorcraft Diesel. Both are available at Walmart.
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SSgt. Richard L Ray, USAF (Retired) - Laura L Ray
Our home is a 1995 Jayco Eagle 277RB 'The Love Shack"
towed by a 2005 Ford F-250 Lariat Crew Cab "The Blue Beast"
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08-01-2011, 07:50 AM
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#4
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Junior Member
Join Date: Jul 2011
Posts: 2
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Shell rotella
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08-01-2011, 08:06 AM
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#5
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Moderator Emeritus
Texas Boomers Club
Join Date: Jul 2000
Location: Cypress, Texas USA
Posts: 6,626
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Shell Rotella, Mobil Delvac and Chevron Delo are all excellent diesel engine oils.
Rusty
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2011 Dodge Ram 3500 Laramie Cummins 6.7L/6 speed auto/4.10LS crew cab LB dually
2004 Doubletree Mobile Suites 36RE3 5th wheel
Come join us on a TEXAS BOOMERS rally!
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08-01-2011, 12:03 PM
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#6
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Senior Member
Fleetwood Owners Club
Join Date: Mar 2011
Posts: 1,386
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Any will work, I use Rotella.
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2009 Amer Coach Allegiance 40X With Spartan Chassis
400 HP Cummins ISL
Pulling a Honda CRV
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08-01-2011, 12:06 PM
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#7
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Senior Member
Join Date: Sep 2010
Location: PalmSpringsSCalDesert
Posts: 161
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any diesel oil with zddp of 1220 or better (IMO)...Delo,Rotella and a couple others..?
Quote:
Originally Posted by CoachDJS
New to me 2003 Excursion with 7.3 diesel. Time for first oil change. In everybody's opinion what is the best oil to use for the 7.3?
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08-01-2011, 03:57 PM
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#8
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Senior Member
Join Date: May 2011
Posts: 179
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I use Shell Rotella T in my 7.3L.
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08-01-2011, 04:10 PM
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#9
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Member
Join Date: Feb 2011
Location: Gardnerville, Nevada
Posts: 56
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Amsoil 15/40 is a full synthetic I use and change it once a year. Usually put on 8-10 k.
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Retired RV Technician
Travlin the West
Winnebago Outlook, Victory Vision, Silverado 3500, Dog ,Wife ( not in that order)
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08-01-2011, 04:17 PM
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#10
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Senior Member
Ford Super Duty Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 1,393
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Our dealership always suggested Shell Rotella. It is a good oil and can be found anywhere. Most engine manufactures say not to change oil brands. they suggest to stay with one brand.
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15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
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08-01-2011, 04:40 PM
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#11
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Senior Member
Join Date: Jan 2011
Location: NY & FL
Posts: 841
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Most diesel geeks who use conventional oils seem to like the Rotella, if you snoop around the diesel truck forums. My choice also.
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2008 Itasca Meridian 37H
2011 & 2012 Len & Pat's "One lap of America"
14K miles so far - Woo Woo! 
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08-01-2011, 05:34 PM
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#12
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Member
Join Date: Jun 2011
Posts: 51
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I happen to be in the oil change business. There are several oils out there that meet the spec for your 7.3. Rotella and Delo are by far the most popular. Rotella also has a 5w40 synthetic that is the most popular synthetic for diesels. I say popular because everyone has an opinion on which one is 'best' for your engine. I read numerous reports over the last 15 years and every one of them says whoever paid for the report has the best oil.
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2012 Sunset Trail Reserve 29SS
2011 Yukon XL 2500 4X4
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08-01-2011, 05:37 PM
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#13
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Member
Join Date: Jun 2011
Posts: 51
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Congrats on the getting the Excursion also. Hard to find a good one in decent shape. I wish Ford or GM one would put a diesel back in an SUV.
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2012 Sunset Trail Reserve 29SS
2011 Yukon XL 2500 4X4
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08-01-2011, 10:01 PM
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#14
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Member
Join Date: Feb 2011
Posts: 37
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I used the local Jiffy Lube to do my F250 6.7. They offer Rotella and a very good price on the change. The guys in the shop in Falcon Colorado were extremely helpful as I figured they would be as we are somewhat rural and every other truck on the road is a diesel. I saved about $70 (paid $117 for the service) and had a good experience.
I called first to ensure they had the oil and the proper filter. I recommend doing the same if you are going this route.
Thanks,
Kelly
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