10w40 in a Cummins 5.9L Six

[JBJ]

block heaters.... The "problem" with Cummins is that they start so easily, but the oil isn't heated and it takes a looong time for it to pump up at even mild winter temps when running 15-40. Watch the oil guage action. With a quick start it is easy to feel like everying is going great with the engine.

Pan heater or a lower pour point are the answers. Block heater, while certainly necessary, is sort of misleading.

Just got my 93 Dodge broken in with 300K+ miles. Now I'm in for the long haul.

 

[Dad2leia]

Hence the reasoning behind my wanting use of a beefed up 10w40, just for the little extra starting protection, without going too far off base so to speak.

Thanks for all of the input everybody!!

 

[n8wvi]

Um, isn't Valvoline Premium Blue Extreme 5w-40 specifically recommended by Cummins? My understanding is that they helped Valvoline develop it. From the Valvoline site: http://www.valvoline.com/pages/products/product_detail.asp?product=113

Dave

 

[ofelas]

Any reason why one wouldn't use a CI-4+ rated oil like Amsoil"s 10w-40 here?
It seems to pour & pump like a 5W-40, and I cannot see it as being worse than Rotella 5W-40 at all.

 

[Rendezvous]

Originally Posted By: ofelas
Any reason why one wouldn't use a CI-4+ rated oil like Amsoil"s 10w-40 here?
It seems to pour & pump like a 5W-40, and I cannot see it as being worse than Rotella 5W-40 at all.


I don't think they make a diesel 10w-40.

 

[beanoil]

Originally Posted By: Rendezvous

Any reason why one wouldn't use a CI-4+ rated oil like Amsoil"s 10w-40 here?
It seems to pour & pump like a 5W-40, and I cannot see it as being worse than Rotella 5W-40 at all.


I don't think they make a diesel 10w-40. [/quote}
Sure they do...

 

[TiredTrucker]

Originally Posted By: JBJ
block heaters.... The "problem" with Cummins is that they start so easily, but the oil isn't heated and it takes a looong time for it to pump up at even mild winter temps when running 15-40. Watch the oil guage action. With a quick start it is easy to feel like everying is going great with the engine.

Pan heater or a lower pour point are the answers. Block heater, while certainly necessary, is sort of misleading.

Just got my 93 Dodge broken in with 300K+ miles. Now I'm in for the long haul.


I really started becoming fond of oil pan heaters in the early 80's. I have them on all my engines. For some reason, a lot of folks prefer to overlook them, but those of us who have used them would not prefer to go without them. They really use so little power but do a very good job. And while a block heater is fine for all the areas the coolant is resting, at least with an oil pan heater to compliment it, the lower block gets some warmth as well. Kind of a complete package. I equate not using a pan heater in conjunction with a block heater as like putting on a coat in cold weather but going without your pants.

 

[Rendezvous]

Originally Posted By: beanoil
Originally Posted By: Rendezvous

Any reason why one wouldn't use a CI-4+ rated oil like Amsoil"s 10w-40 here?
It seems to pour & pump like a 5W-40, and I cannot see it as being worse than Rotella 5W-40 at all.


I don't think they make a diesel 10w-40. [/quote}
Sure they do...

He said Amsoil

 

[Garak]

I didn't check, but the Amsoil 10w-40 may have the relevant diesel spec for an engine of that vintage. Royal Purple's 10w-40 certainly did.

 

[Rendezvous]

Originally Posted By: Garak
I didn't check, but the Amsoil 10w-40 may have the relevant diesel spec for an engine of that vintage. Royal Purple's 10w-40 certainly did.


Yea that's true. I was just going by looking in the diesel section on their website.

 

[Garak]

Yep, a few of the 10w-40 oils available can do that, although it's getting to be harder to find. Amsoil is one I'd probably be most willing to trust in that regard.

 

[nyumski]

have u tried use Q8 T800 10w40? it is one of hdeo oil with 10w40 sae but feels like 5w40..apart from the winter problem..i think it closes to 5w40 specs..since in my place there is no winter in my weather.

 

[ofelas]

TYPICAL PHYSICAL PROPERTIES
AMSOIL High Performance Synthetic 10W-40 Motor Oil (AMO)

Kinematic Viscosity @ 100°C, cSt (ASTM D445)
14.5
Kinematic Viscosity @ 40°C, cSt (ASTM D445)
91.7
Viscosity Index (ASTM D2270)
164
CCS Viscosity @ -25°C, cP (ASTM D5293)
5638 (-25)
Pour Point °C (°F) (ASTM D97)
-44 (-47)
Flash Point °C (°F) (ASTM D92)
230 (446)
Fire Point °C (°F) (ASTM D92)
250 (482)
High Temperature/High Shear @ 150°C and 1.0 X 106 s-1, cP (ASTM D4683), cP
4.3
Four Ball Wear Test (ASTM D4172 @ 40 kgf, 150°C, 1800 rpm, 1 hour, Scar in mm)
0.40
Noack Volatility, % weight loss (g/100g) (DIN 51581)
6.7
Total Base Number
12.1

AMSOIL Premium Protection Synthetic Motor Oil is recommended for air- and liquid-cooled, large or small gasoline and diesel engines, transmissions and chaincase applications where 10W-40 oils are required with any of the following specifications:

API SL, SJ, SH, SG
API CI-4+, CI-4, CH-4, CF, CF-2
ISO-L-EMA
Caterpillar ECF-1
JASO MA (Motorcycle)
MAN 271/3275
MTU Type 2
Cummins 20071/20072/20076/20077
Volvo, VDS-2, VDS
Mack EO-M+, EO-M
ACEA A3/B3, E3, E5
MB 228.1, 228.3, 229.1
Detroit Diesel 93K214

Diesel Engine Service
•Normal Service - Up to 25,000 miles or one year, whichever comes first, or longer based on oil analysis.
•Severe Service - Up to 15,000 miles or one year, whichever comes first, or longer based on oil analysis.

Gasoline Engine Service
•Normal and Severe Service - Up to 15,000 miles or one year, whichever comes first, or longer based on oil analysis.