which oil is best??? - TheDieselGarage.com
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post #1 of 21 (permalink) Old 03-16-2010, 08:31 PM Thread Starter
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which oil is best???

Hey whats up/

just got my dodge cummins, 1999 with 57,000 miles on it.

I have heard over and over again to use rotella,

now when i went to the store to find out what to get the only rotella they had that was 15-40 was the rotella T, and it wasnt synthetic im guessing.

so i went and looked around more, the rotella fully senthetic only came in 5-40, so im like WTF haha.

what should i do???

thankyou
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post #2 of 21 (permalink) Old 03-16-2010, 08:56 PM
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I have had personal experience with Mobil 1, rotella, and now ams-oil. Honestly its just preference in my opinion. There are people who have ran rotella for over 600k and never had a problem, and I'm sure that if you were to run ams-oil or Mobil 1 with regular changes you wouldn't run into any problems. As long as you change it when it needs to be changed.

Personally, I run ams-oil now and am happy with it, couldn't ask for more.
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post #3 of 21 (permalink) Old 03-16-2010, 09:05 PM Thread Starter
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Ok thankyou i will keep that in mind, but when it comes to rotella, which "model" do i use, i would like to use fully synthetic but does rotella even make it for 15-40?

or should i just do the rotella t in the white bottles?
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post #4 of 21 (permalink) Old 03-16-2010, 11:52 PM
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Delo 400 15w40 is way better than Rotella T. Rotella is good don't get me wrong. but has way more soot. Delo is 100 times better. If you want synthetic use Mobil 1 5w-40 instead of the rotella 5w40.
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post #5 of 21 (permalink) Old 03-17-2010, 12:11 AM
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Rotella-t makes a regular oil its 15-40 thats what I've been using for 8 years now.
it only comes in 15-40. Thats also what my company uses in the big rigs, doesn't start to turn black till about 8000-10,000 miles, service is usually done at 12,000.

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post #6 of 21 (permalink) Old 03-17-2010, 12:33 AM
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I got a member on my site that is running Delo for over 600K miles (92 dodge Cummins) no problems...

Then I got another member with 01 with over 795K miles heading for 800K using both Shell Rotella and Chevron Delo no issues...

I got a really wild one 2004.5 Dodge Cummins... Another member running SuperTech Unversial 15W-40 and a Motorguard Bypass filter and hasn't changed the oil now for 75K miles and still going. He's running Blackstone Lab test and still got good results every filter change...

As long as it diesel rated oil and changed at 7.5K miles (stock setup) or 10K with bypass filter (Frantz Filter) you should be fine...

2 cents...

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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post #7 of 21 (permalink) Old 03-17-2010, 03:20 AM
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I run SAE60 AMSOIL i have had an oil related issue yet

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post #8 of 21 (permalink) Old 03-17-2010, 03:29 AM
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Valvoline is owned by Cummins... may want to take that into consideration

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post #9 of 21 (permalink) Old 03-17-2010, 04:15 PM
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Quote:
Originally Posted by BriteWhiteRam View Post
Valvoline is owned by Cummins... may want to take that into consideration
thats just like everyone thinking ford owns cummins.


I run amsoil in mine and like the fact it quieted down my idle according to my neighbors. No matter what oil you run it will be black when you change it. A lot of people claim their diesel oil is still honey colored when they change it, but I have not seen it. 3 guys one dodge one ford one chevy all run bypass setups and by 6k it's black if not before that.

01 quad cab 4x4, edge drag comp, 4" exhaust, fass 150, 250 ddps, Jefferson State compounds 683hp so vp 11.91. AMSOIL front to rear. now back to stock 95 fummins in the works
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post #10 of 21 (permalink) Old 03-17-2010, 06:28 PM
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Quote:
Originally Posted by 01quadcab View Post
thats just like everyone thinking ford owns cummins.
No kidding...

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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