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08-12-2018, 11:12 PM
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#1
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Senior Member
Join Date: Aug 2016
Posts: 114
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Rotella T4, T5 or T6?
Which one would you use in a 2004 525hp C-13 with 55k miles in a 56k lb Class A? I'm a fair weather full timer, so not too hot or cold.
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08-13-2018, 08:00 AM
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#2
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Senior Member
Join Date: Nov 2009
Location: Warren, Oregon
Posts: 2,560
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I like a Syn oil so I would go with Rotella T6 5w40.
I run Amsoil 5w40 in my 06 Ford PSD with a HEUI system same as my C9 (oil fired Injectors) so I'm thinking of using Mobil 1 5w40, Amsoil 5w40 or Rotella T6 5w40. Syn oil can handle the heat and will not coke turbo bearings if you turn it off to soon.
2 stroker
__________________
2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
Cat C9--STEEL & COPPER Bolt Together Radiator w/ updated rubber mounting
SilverLeaf 330 Magnum 2812 PSW 2011 Ford Edge Sport-Air Force One
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08-13-2018, 02:04 PM
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#3
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Senior Member
Monaco Owners Club
Join Date: Aug 2017
Location: Orlando, Florida
Posts: 5,819
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I run the Rotella T6 in my CAT C13 too.
It's not cheap when you need 40 quarts of it. The best price I found was getting it from Walmart on-line. Today it's selling for $65 for 3 gallons ($5.45/qt).
https://www.walmart.com/ip/Shell-Rot...-pack/54604958
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08-15-2018, 03:24 PM
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#4
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Senior Member
Join Date: Aug 2016
Posts: 114
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Quote:
Originally Posted by CountryB
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What weight of T6 do you use?
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08-15-2018, 03:32 PM
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#5
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Senior Member
Join Date: Aug 2016
Posts: 114
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turbo protection
ignore
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08-15-2018, 03:33 PM
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#6
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Senior Member
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 8,889
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I feel like it is more important to change the oil frequently and not about the "value" of synthetic oil. I go with the T4 since it does meet the requirements for a Cat engine.
__________________
Good Luck, Be Safe and Above All, Don't Forget To Have Fun 
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
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08-15-2018, 03:52 PM
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#7
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Member
Join Date: Jul 2018
Posts: 51
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Full Synthetic is far superior to conventional oil when it comes to all the attributes that matter. I would use full synthetic for a longer change interval and change it when an oil analysis indicates it is necessary. After you do this a few times you can get a feel for how often changes are needed in the future.
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08-15-2018, 10:21 PM
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#8
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Senior Member
Join Date: Aug 2016
Posts: 114
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Quote:
Originally Posted by AaronColo
Full Synthetic is far superior to conventional oil when it comes to all the attributes that matter. I would use full synthetic for a longer change interval and change it when an oil analysis indicates it is necessary. After you do this a few times you can get a feel for how often changes are needed in the future.
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I agree with the first sentence. It's convenient for me to change my own oil (T4) each summer where I stay. It was about 6000 miles since last summer. If an oil analysis says my oil was spent, I'll switch to syn oil next time
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08-16-2018, 02:40 PM
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#9
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Senior Member
Monaco Owners Club
Join Date: Aug 2017
Location: Orlando, Florida
Posts: 5,819
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Quote:
Originally Posted by AaronColo
and change it when an oil analysis indicates it is necessary.
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+1 
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09-11-2018, 06:28 AM
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#10
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Senior Member
Join Date: Sep 2013
Posts: 979
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Quote:
Originally Posted by 2 Stroker
I like a Syn oil so I would go with Rotella T6 5w40.
I run Amsoil 5w40 in my 06 Ford PSD with a HEUI system same as my C9 (oil fired Injectors) so I'm thinking of using Mobil 1 5w40, Amsoil 5w40 or Rotella T6 5w40. Syn oil can handle the heat and will not coke turbo bearings if you turn it off to soon.
2 stroker
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Ok... is it T6 15/40 or 5/40. I though all DP motor oil was supposed to be 15/40 weight.
__________________
U.S. Army Retired, 2002 Beaver Patriot Thunder
40 Ft, CAT C12, 455 HP, 1550 Ft Lbs Torque
Towing 2019 Chevy Equinox, AWD Turbo Diesel
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09-11-2018, 07:06 AM
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#11
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Senior Member
Monaco Owners Club
Join Date: Aug 2017
Location: Orlando, Florida
Posts: 5,819
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Quote:
Originally Posted by MO Fred
I though all DP motor oil was supposed to be 15/40 weight.
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It depends on the climate. CAT even recommends 0W-40 (or 5W-40 Syn) in cold weather.
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09-11-2018, 07:43 AM
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#12
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Senior Member
Join Date: Sep 2013
Posts: 979
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Quote:
Originally Posted by CountryB
It depends on the climate. CAT even recommends 0W-40 (or 5W-40 Syn) in cold weather.
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My oil is being changed late today and I live in southern Missouri where it usually gets down between zero and the 2o's during the Winter. Which T6 oil weight would you recommend for my coach?
__________________
U.S. Army Retired, 2002 Beaver Patriot Thunder
40 Ft, CAT C12, 455 HP, 1550 Ft Lbs Torque
Towing 2019 Chevy Equinox, AWD Turbo Diesel
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09-12-2018, 12:45 AM
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#13
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Senior Member
Join Date: Nov 2009
Location: Warren, Oregon
Posts: 2,560
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Quote:
Originally Posted by MO Fred
My oil is being changed late today and I live in southern Missouri where it usually gets down between zero and the 2o's during the Winter. Which T6 oil weight would you recommend for my coach?
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Fred
I would go with the T6 5w40. When it is cold out the oil will get to the bearings quicker 5w and as it warms up the oil will move up to a 40w. If you live in Arizona 15w40 would be just right.
2 stroker
I pull oil samples on every oil change and send it in the Peterson Cat, cost $13.50
__________________
2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
Cat C9--STEEL & COPPER Bolt Together Radiator w/ updated rubber mounting
SilverLeaf 330 Magnum 2812 PSW 2011 Ford Edge Sport-Air Force One
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09-14-2018, 04:43 PM
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#14
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Senior Member
Join Date: Sep 2016
Location: huntsville ontario canada
Posts: 116
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I am on my 2nd change with t6 and for the extra cost I think it is worth it
124k (miles ) on the cat and love the power
dave
__________________
dave , karen
2000 featherlite vogue cat 550 hp
home base huntsville ont canada
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