which oil is best??? [Archive] - TheDieselGarage.com

: which oil is best???


davidfast1
03-16-2010, 08:31 PM
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:wave

Carbur8tr
03-16-2010, 08:56 PM
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.

davidfast1
03-16-2010, 09:05 PM
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?

hin0031
03-16-2010, 11:52 PM
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.

ICEMAN3005
03-17-2010, 12:11 AM
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.

Mopar1973Man
03-17-2010, 12:33 AM
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...

M123KT-450
03-17-2010, 03:20 AM
I run SAE60 AMSOIL i have had an oil related issue yet :thumbsup

Mike

BriteWhiteRam
03-17-2010, 03:29 AM
Valvoline is owned by Cummins... may want to take that into consideration :happymugs

01quadcab
03-17-2010, 04:15 PM
Valvoline is owned by Cummins... may want to take that into consideration :happymugs

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.

Mopar1973Man
03-17-2010, 06:28 PM
thats just like everyone thinking ford owns cummins.

No kidding... :damnit

BriteWhiteRam
03-17-2010, 06:47 PM
I know Ford has no stake in cummins

I suppose cummins doesnt own fleetguard either?? :poke

01quadcab
03-17-2010, 07:43 PM
I know Ford has no stake in cummins

I suppose cummins doesnt own fleetguard either?? :poke

cummins owns fleetguard, but valvoline and cummins have just been partnering up on some things. I looked it up online. From what I found they are not owned by cummins. http://www.valvoline.com/faqs/our-business/company-overview/
if I am wrong show me.

M123KT-450
03-17-2010, 08:38 PM
I have seen this honey colored oil normally during short service break interval's for diesel's but mostly common in Gasser's.

OIL <--seen that tint a few times myself in new/young low mile diesels and broke in Gasser's.

EDIT:
Cummins diesel corp is owned by Cummins diesel corp :thumbsup


Mike

cumminsdude2001
03-22-2010, 01:06 AM
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.


I totally agree about the delo 400 15w40. Much much better at controling soot and sludge. and holds its viscosity much better. I have even liked valvoline cummins premium blue.

M123KT-450
04-02-2010, 08:06 PM
Slippery oil is better then none slippery oil but not as good as super slippery oil :thumbsup


Mike

keydl
04-04-2010, 03:08 AM
A none scientific test - dip your hands in the oil and then go wash it off with soap - not degreaser or detergent. Synthetic is a lot harder to get off.

I like Rotella Synthetic, Rotella, Delo 400, and use the Supertech in the lawnmower - not opposed to using it for makeup oil in a diesel.

Not convinced that Mobile 1 is worth the difference - if you can find it for diesel.

cumminsracer2010
04-09-2010, 01:36 AM
i believe amsoil 15-40 100% synthetic is the best choice for the diesels

fraso
04-09-2010, 04:25 PM
I think the oil change interval is more important than the brand of oil used. I think you will get slightly better fuel economy with a synthetic oil (like 0W-40 or 5W-40) because their HTHS (http://www.acccc.net/index.php?option=com_content&view=article&id=49%3Aengine-oil&catid=47%3Amaintenance&Itemid=37&limitstart=1) will be slightly lower than the HTHS of a conventional 15W-40. Also, a synthetic oil will be thinner at start-up than a 15W-40 so less fuel will wasted until the oil is fully warm.

Synthetic 40-weight Heavy Duty Engine Oils (http://www.acccc.net/index.php?option=com_content&view=article&id=51%3Ahdeo&catid=47%3Amaintenance&Itemid=37&limitstart=2)

M123KT-450
04-11-2010, 01:55 AM
AMSOIL makes a fully synthetic 15w-40, 5w-40, 10w-30, and SAE30 diesel oils, I'm also told they offer a 5w-30 diesel oil too ? . . .

Mike

stillcrazyinlaw
04-11-2010, 05:04 AM
I have always used delo15w40 in my 12 valve for 260,000 and no oil related problems,pretty affordable to use and good oil to boot.

M123KT-450
04-11-2010, 02:47 PM
Its a Cummins you could pour 5w-20 Super tech into them and get 200K miles out of them.

As long as the oil is some what slippery its going to run strong and live long :thumbsup

Just the POS dodge truck its mounted in will keep up with the engine . . .

Mike