Recent Topics
Can you move a car with the starter?
by atikovi - 01/19/20 04:49 PM
Leaf spring advice.
by mpack88 - 01/19/20 02:19 PM
Detroit 4-53T swap update.
by A310 - 01/19/20 12:54 PM
Wiper arm tension...
by Loogie - 01/19/20 12:26 PM
Changing Battery
by Char Baby - 01/19/20 12:16 PM
UOA shelf life
by STIcandy - 01/19/20 12:02 PM
2015 Ram Engine Oil
by nemtulea - 01/19/20 12:02 PM
Fram TG7317 1000 miles
by KenshinHimura - 01/19/20 11:57 AM
2013 Escape 2.0 Ecoboost surge
by HoosierJeeper - 01/19/20 10:36 AM
European Tools via Amazon - New Lug Wrench
by JHZR2 - 01/19/20 09:57 AM
Samsung 32 inch 4K curved monitor at Costco
by Cujet - 01/19/20 09:55 AM
2009 corolla 1.8
by Bettez88 - 01/19/20 09:41 AM
Remote key - OEM vs aftermarket
by AZjeff - 01/19/20 08:13 AM
Toyota Tundra Warranty
by Tundra73 - 01/19/20 08:10 AM
Shell Rotella gas truck oil change intervals?
by gtrplr71 - 01/19/20 07:12 AM
Ford Focus belt idler puller bolt ?
by rkpatt - 01/19/20 06:51 AM
Havoline 5w20 $1.72/quart
by Villalobos - 01/19/20 05:42 AM
Amazon 5qt PUP 5w-20 $16.24
by Matt1980 - 01/19/20 03:42 AM
Newest Members
powhitehorn, Centripetal, MRLakersLA, elksniserviss_lv, Sukhi
70476 Registered Users
Who's Online Now
103 registered members (atikovi, AC1DD, 928, ammolab, avi1777, Aero540T, 8 invisible), 3,060 guests, and 25 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics300,322
Posts5,173,273
Members70,476
Most Online3,825
Jan 19th, 2020
Donate to BITOG
Print Thread
Hop To
Page 1 of 2 1 2
2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT #5289038 12/09/19 02:28 AM
Joined: Mar 2016
Posts: 17
J
J_mo Offline OP
OP Offline
J
Joined: Mar 2016
Posts: 17
I have a 2015 2500 6.7 Cummins that has had a Donaldson dbl7349 and eabp 100 bypass since new, with oci intervals at 7500mi using mobil 1 5-40 turbo diesel.
I live in Northern California, the truck sees no sub 40 degree weather. Truck is at 44,500 miles as of today.
However, the truck is used now for heavy towing. 17.5k 5th wheel toy hauler. I have stuck with 5-40, as it is synthetic and not conventional.

I am finding tonight I may be doing this wrong and need to be with a 15-40 instead?

Thanks for the help fellas. This place is always great to me, but I'm more of a lurker than a poster. You guys are far superior to me in your knowledge and intelligence, so I have more to gain by reading and respecting as opposed to posting.


2015 cummins 6.7 - DBL7349- eabp100- M1 5-40 TDT
2006 F-350 6.0 - Lf3656 - eabp110 - Rotella t6 / 5-40 M1 5-40 TDT
2018 Wrangler JL 3.6 (The lady's) under warranty - mopar mo349 - Valvoline Syn 0-20
Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5289041 12/09/19 03:00 AM
Joined: Sep 2010
Posts: 11,433
4WD Offline
Offline
Joined: Sep 2010
Posts: 11,433
Delo/Delvac/Rotella are the holy trinity of HDEO. And base stocks are improving where the NOACK and other specs are better. Further, 15w40 does not need lots of viscosity modifiers like the widespread variants do. (5w40).
Indeed, you can run what we run in larger engines. The motor will go a long ways and so will your cash.

OEM approval can get a bit more complex with 15w40 since drums make big money and gallons not as much.
So for example we are hearing Mobil Delvac Super comes FF in the new Duramax … but Mobil has not plastered that all over the place like they do the Dexos products.
Any of these above are solid in 15w40.

Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5289078 12/09/19 05:51 AM
Joined: Oct 2004
Posts: 9,856
B
bullwinkle Offline
Offline
B
Joined: Oct 2004
Posts: 9,856
As long as it's working, not burning off while you're towing, there's nothing wrong with it. I like Delvac 1 ESP 5W40 better, but TDT is good too.


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5289087 12/09/19 06:19 AM
Joined: May 2007
Posts: 8,377
dnewton3 Online Content
Global Moderator
Online Content
Global Moderator
Joined: May 2007
Posts: 8,377
I don't know that it would be fair to say you're doing it "wrong", but probably you're wasting a LOT of money on syns a BP for 7.5k miles.

Last edited by dnewton3; 12/09/19 06:20 AM.

The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money
Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5289119 12/09/19 07:11 AM
Joined: Dec 2017
Posts: 5,598
S
Snagglefoot Offline
Offline
S
Joined: Dec 2017
Posts: 5,598
Here it is from your owners manual. Yes, RAM asks you run 15W40 except when temperatures are below 0 degrees F. They don't want you starting your engine with 15W40 when temps are that low but are fine with you running 5W40. This all was asked by another person a few days ago. Maybe you read it?

The owners manual asks for CJ-4 and TDT is CJ-4.

I would say there is absolutely no issue. If you are nervous, perhaps have a UOA done and check if it sheared down at all in 7500 miles.

Like 4WD said, there are oils that the big rigs run, and your owners manual actually suggest them. Rotella is now out with a 15W40 oil that is perfect for your application. It meets Ck-4 and CJ-4 requirements. It also meets Cummins CES 20086 which supersedes CES 20081. I'm sure the Chevron fans are going to jump in now. laugh

2016 RAM Cummins Oil Requirement Part B.PNG
Last edited by Snagglefoot; 12/09/19 07:31 AM.

If you want the job done right......do it yourself.
Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5289125 12/09/19 07:20 AM
Joined: Jun 2003
Posts: 20,114
C
Chris142 Offline
Offline
C
Joined: Jun 2003
Posts: 20,114
My friend that uses the same truck for a hot shot operation runs 5w40 year round. The engine is fine. It's the transmissions that explode for no reason.

BTW do you have a CDL?


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5289136 12/09/19 07:33 AM
Joined: Mar 2004
Posts: 23,627
D
Donald Online Content
Online Content
D
Joined: Mar 2004
Posts: 23,627
Originally Posted by J_mo
I have a 2015 2500 6.7 Cummins that has had a Donaldson dbl7349 and eabp 100 bypass since new, with oci intervals at 7500mi using mobil 1 5-40 turbo diesel.
I live in Northern California, the truck sees no sub 40 degree weather. Truck is at 44,500 miles as of today.
However, the truck is used now for heavy towing. 17.5k 5th wheel toy hauler. I have stuck with 5-40, as it is synthetic and not conventional.

I am finding tonight I may be doing this wrong and need to be with a 15-40 instead?

Thanks for the help fellas. This place is always great to me, but I'm more of a lurker than a poster. You guys are far superior to me in your knowledge and intelligence, so I have more to gain by reading and respecting as opposed to posting.


Do a UOA. You can increase your OCI I will bet. I surely have, but am not doing any towing.


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5289242 12/09/19 09:50 AM
Joined: Feb 2003
Posts: 9,235
C
Cujet Offline
Offline
C
Joined: Feb 2003
Posts: 9,235
M1 TDT is a very robust oil and with an HTHS of 3.8, it's capable of handling the heat. The 15W-40 has an HTHS of 3.7. The synthetic will likely be a better choice.


People who count on their fingers should maintain a discreet silence.
Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5289249 12/09/19 09:53 AM
Joined: Feb 2009
Posts: 2,252
K
krismoriah72 Offline
Offline
K
Joined: Feb 2009
Posts: 2,252
With that Engine, that OCI and your climate... Supertech 15w40 would most likely yield the same results..

TDT is good stuff.. if you are happy with it just keep it in longer.

Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5289379 12/09/19 01:02 PM
Joined: May 2016
Posts: 512
B
Bighorn2500 Offline
Offline
B
Joined: May 2016
Posts: 512
My 2012 Ram has run on 5w40 for the last 100k plus miles. It doesn’t care if it was Rotella T6, Mobil TDT, Delvac 1 or VPBE with Fleetguard, Donaldson and Baldwin filters over the last seven years with no issues or concerns.

UOA’s would help considering you have a bypass.


2012 Ram 2500 SLT 6.7L Cummins 4x4
2018 Dodge Durango GT 3.6L 4x4
Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5289384 12/09/19 01:11 PM
Joined: May 2015
Posts: 413
K
Killer223 Offline
Offline
K
Joined: May 2015
Posts: 413
these engines are not hard on oil, ith over 1.5 million miles combined on my cummins trucks, run what ever is on sale. i change mine at 10K.
i like the Travellers from tractor supply, and i get valvoline in bulk. i've ran the mobile MXf2, again, what ever is on sale. the engine doesnt care one iota, long as it's change when it should be, and thats about the 500 hour mark.

So to recap, run the correct type of oil for a diesel, of the correct grade for your climate, can be 5/40 or 15/40, makes no difference to the engine, only your bank account. change it when it should be.

Last edited by Killer223; 12/09/19 01:13 PM.

19 accord 6sp 2.0T
04 5.9 cummins
95 12V NV4500.
11 ranger 4.0
18 crf450RX
19 Talon
17 Pioneer 1k.
Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5289386 12/09/19 01:16 PM
Joined: Mar 2016
Posts: 17
J
J_mo Offline OP
OP Offline
J
Joined: Mar 2016
Posts: 17
Thanks for all the replies guys!
Now that rotella has come out with a 15-40 variant T6 in synthetic that's what I'll swap over to.
Majority of those miles are highway. I dont drive the truck much but to pull our 5ver these days, so its annually instead of miles. It sees a few trips a year and spends the rest of it's time in hibernation in the garage.
I daily drive my 6leaker, which I think next go I'll give a run of that 15-40 T6 also. I just did the oil 2 weeks ago with some m1 tdt I had.


2015 cummins 6.7 - DBL7349- eabp100- M1 5-40 TDT
2006 F-350 6.0 - Lf3656 - eabp110 - Rotella t6 / 5-40 M1 5-40 TDT
2018 Wrangler JL 3.6 (The lady's) under warranty - mopar mo349 - Valvoline Syn 0-20
Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5290186 12/10/19 08:34 AM
Joined: Oct 2010
Posts: 7,665
A
A_Harman Offline
Offline
A
Joined: Oct 2010
Posts: 7,665
Originally Posted by J_mo
I have a 2015 2500 6.7 Cummins that has had a Donaldson dbl7349 and eabp 100 bypass since new, with oci intervals at 7500mi using mobil 1 5-40 turbo diesel.
I live in Northern California, the truck sees no sub 40 degree weather. Truck is at 44,500 miles as of today.
However, the truck is used now for heavy towing. 17.5k 5th wheel toy hauler. I have stuck with 5-40, as it is synthetic and not conventional.

I am finding tonight I may be doing this wrong and need to be with a 15-40 instead?

Thanks for the help fellas. This place is always great to me, but I'm more of a lurker than a poster. You guys are far superior to me in your knowledge and intelligence, so I have more to gain by reading and respecting as opposed to posting.
.

The Cummins engine just doesn't care about what oil is in it. 5w40 or 15w40. It doesn't shear 5w40 towing in hot weather. I have hot-shotted year-round with RT6 5w40 on oil change intervals as long as 37,000 miles. I have hot-shotted using conventional 15w40 on OCI's as long as 29,000 miles. Oil analyses have never shown any viscosity loss, excessive wear metals, or acid neutralization ability. If you are not going to extend OCI's past 12k miles, synthetic 15w40 is a waste of money. If you want to adhere to the 7500 mile OCI, conventional 15w40 from Mobil, Shell, Chevron, or Kendall will do the job for hundreds of thousands of miles.


2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: J_mo] #5290568 12/10/19 03:48 PM
Joined: Dec 2005
Posts: 4,444
0
02SE Offline
Offline
0
Joined: Dec 2005
Posts: 4,444
I don't put a lot of miles on my truck, about 12k in almost three years. I've used Shell Rotella 15w40, changed solely on time. I've started it in ambient temps close to 0° F. It pretty much only tows a 26k+ 5th wheel toy hauler. No issues.

Re: 2015 6.7 cummins, have I been doing it wrong? 5-40 M1 TDT [Re: 02SE] #5290590 12/10/19 04:11 PM
Joined: Mar 2016
Posts: 17
J
J_mo Offline OP
OP Offline
J
Joined: Mar 2016
Posts: 17
Originally Posted by 02SE
I don't put a lot of miles on my truck, about 12k in almost three years. I've used Shell Rotella 15w40, changed solely on time. I've started it in ambient temps close to 0° F. It pretty much only tows a 26k+ 5th wheel toy hauler. No issues.



This is basically me. I have put 3500 miles since last june (2018). I change it annually or 7500mi. Annually nearly always comes first With the exception of putting 20k commute miles on in a year in 2017. the truck has seen very little annual miles. I purchased new dec 1 2014.
2017 I bought our grand design and it has had a handful of tow miles added. Somewhere in the 7-8k range I'd assume without checking the truck.

The truck also has no regenerative soot devices pe se.


2015 cummins 6.7 - DBL7349- eabp100- M1 5-40 TDT
2006 F-350 6.0 - Lf3656 - eabp110 - Rotella t6 / 5-40 M1 5-40 TDT
2018 Wrangler JL 3.6 (The lady's) under warranty - mopar mo349 - Valvoline Syn 0-20
Page 1 of 2 1 2
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™