What weight of oil for my Dodge diesel?

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[ARCHIVED THREAD] - What weight of oil for my Dodge diesel?

Posted: 10/28/2010 7:10:39 PM EDT

I have a 2003 3/4 Ram truck with a Cummins. What weight oil should I be using?

Posted: 10/28/2010 7:12:00 PM EDT

[#1]

15w-40, although I ran 10w 5w40 in my Dmax just fine.
ETA: Amsoil sells both a 5W and 15W for diesel applications, so it must have been 5W I was running just fine.

Posted: 10/28/2010 7:12:22 PM EDT

[#2]

T6 Rotella or Mobil 1 Turbo Diesel Truck. Both are 5w40.

Posted: 10/28/2010 7:13:29 PM EDT

[#3]

Quoted:

15w-40, although I ran 10w40 in my Dmax just fine.

15W-40 in the Dodge....

Posted: 10/28/2010 7:14:48 PM EDT

[#4]

15-40

Posted: 10/28/2010 7:16:29 PM EDT

[#5]

Yeperz 15W 40 pick your brand

Posted: 10/28/2010 7:21:11 PM EDT

[#6]

DELO 400

Posted: 10/28/2010 7:21:41 PM EDT

[#7]

Quoted:

I have a 2003 3/4 Ram truck with a Cummins. What weight oil should I be using?

I always figured the weight was less important than the correct spec for diesel.

I use 15/40 Rotella T or Valvoline Premium Blue (endorsed by Cummins) for dinosaur oil, but you may want to look at synthetics that run lighter for cold weather protection.

Ask the guys in your area on http://turbodieselregister.com/.

I've been a member there for about 10-12 years, a pretty good buncha guys who are into Dodge diesels.

Posted: 10/28/2010 7:25:30 PM EDT

[#8]

The only oil I use in my Dodge Cummins is Vavoline Premium Blue...IIRC it is 15w40. You can get it by the gallon at your local NAPA auto store.

Posted: 10/28/2010 7:26:56 PM EDT

[#9]

Also make sure you use a diesel-designated oil. Supposedly oils for gas engines may foam in a diesel engine, which is bad.

Posted: 10/28/2010 7:41:44 PM EDT

[#10]

Quoted:
Also make sure you use a diesel-designated oil. Supposedly oils for gas engines may foam in a diesel engine, which is bad.

This. Diesels contaminate their oil with fine soot. Detergents in regular oil will bind to the soot and turn the oil to sludge.

Posted: 10/28/2010 9:54:00 PM EDT

[#11]

Quoted:

Quoted:
I have a 2003 3/4 Ram truck with a Cummins. What weight oil should I be using?

I always figured the weight was less important than the correct spec for diesel.

I use 15/40 Rotella T or Valvoline Premium Blue (endorsed by Cummins) for dinosaur oil, but you may want to look at synthetics that run lighter for cold weather protection.

Ask the guys in your area on http://turbodieselregister.com/.
I've been a member there for about 10-12 years, a pretty good buncha guys who are into Dodge diesels.

As long as its a CI-4 rated oil and it will normally be SAE30 or 15w40. Semisynthetic stuff is 5w40. Then there is the full synthetic in a range of weights and they will work. With it going into winter, I wouldn't go with anything thicker than 15w40.

Derail..
Kaos, I haven't been on TDR in forever. Is Steve still the webmaster over there?

Posted: 10/28/2010 10:08:34 PM EDT

[#12]

Place i worked at we ran 0w30 syn delo rated for dsl.
Ran it from Nov to May in all dsl's.
But the temps went from -40f to mid 30f range.

Syn 5w40 would work well for you.

Posted: 10/28/2010 10:16:31 PM EDT

[#13]

FWIW...there are some good forums for Dodge trucks and Cummins diesels...here's one...

http://www.cumminsforum.com/

Posted: 10/28/2010 10:20:49 PM EDT

[#14]

Quoted:

Quoted:

I have a 2003 3/4 Ram truck with a Cummins. What weight oil should I be using?

I use 15/40 Rotella

This is what our truck gets fed.

Posted: 10/28/2010 10:29:40 PM EDT

[#15]

What does the owner's manual say? What is printed on the oil cap?

Your answer is there.

Posted: 10/28/2010 10:56:53 PM EDT

[#16]

Quoted:
FWIW...there are some good forums for Dodge trucks and Cummins diesels...here's one...

http://www.cumminsforum.com/

All the Cummins info you could want right there.

Posted Via AR15.Com Mobile

Posted: 10/28/2010 11:07:09 PM EDT

[#17]

Quoted:
DELO 400

I used to run that in my RX7

Good shit.

Makes for an interesting campfire too.

Posted: 10/28/2010 11:13:36 PM EDT

[#18]

5w40 Amsoil

www.dodgeownerforums.com

Posted: 10/29/2010 5:59:42 AM EDT

[#19]

www.turbodieselregister.com

www.dieseltruckresource.com

15W-40 dino

5W-40 syn

rotella synthetic is what i have run in my 4 CTD's ...

600k miles with no problems ...

http://www.genosgarage.com/prodinfo.asp?number=LF16035

best filter available and reasonably priced as well ...

Posted: 10/29/2010 6:00:38 AM EDT

[#20]

Quoted:
What does the owner's manual say? What is printed on the oil cap?

Your answer is there.

Bingo

Posted: 10/29/2010 7:23:32 AM EDT

[#21]

Quoted:

Quoted:

I have a 2003 3/4 Ram truck with a Cummins. What weight oil should I be using?

I always figured the weight was less important than the correct spec for diesel.

I use 15/40 Rotella T or Valvoline Premium Blue (endorsed by Cummins) for dinosaur oil, but you may want to look at synthetics that run lighter for cold weather protection.

Ask the guys in your area on http://turbodieselregister.com/.

I've been a member there for about 10-12 years, a pretty good buncha guys who are into Dodge diesels.

As long as its a CI-4 rated oil and it will normally be SAE30 or 15w40. Semisynthetic stuff is 5w40. Then there is the full synthetic in a range of weights and they will work. With it going into winter, I wouldn't go with anything thicker than 15w40.

Derail..

Kaos, I haven't been on TDR in forever. Is Steve still the webmaster over there?

Yes he is, and still running a finely tuned machine.

Posted: 10/29/2010 7:40:17 AM EDT

[#22]

Shell Rotella 15w40. API Service CJ-4/SM
Meets performance requirements of Cummins CES 20081.

[ARCHIVED THREAD] - What weight of oil for my Dodge diesel?

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