oil temperatures - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 5 (permalink) Old 06-03-2015, 01:16 PM Thread Starter
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oil temperatures

Just wondering what is the optium temperature for engine oils. My 2013 6.7 cummins runs 197-199* at 70-75mph. That seems high for optium lubrication(run delo 15-40). (One thing I noticed is rpms has a bigger impact on temps compared to load. Run the same temp if towing or not, but drop a gear or two at same speed temp will go up some.) Or do manufactures let it run this high to gain a percentage point or two in fuel economy. I know on hydraulic systems on equipment I build or run we keep oil at 180 or less.

So whats the best temperature for lubrication vs economy?
What do others see in oil temperatures? (maybe a poll here?)

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post #2 of 5 (permalink) Old 06-10-2015, 07:53 PM
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197-199 is on the high side. You might want to consider having the engine coolant checked to see if it's doing its job. If its okay then you might want to consider checking the oil cooler.

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post #3 of 5 (permalink) Old 06-14-2015, 02:39 PM Thread Starter
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Quote:
Originally Posted by New 0mega View Post
197-199 is on the high side. You might want to consider having the engine coolant checked to see if it's doing its job. If its okay then you might want to consider checking the oil cooler.
My coolant runs 188-190* I think the Thermostat is 190 as you can see the temp bounce between 188 and 190 as it opens and closes.

I still think its an economy thing because I have shot oil temps on the filter with an infared gun on some later model engines in equipment and they are also running close to 200*

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2013 6.7 CTD 2500, 800 ft-lbs torque, 4x4 crewcab Larmine Longhorn edition, 6 sp. auto, 2 tone white/gold
--07 6.7CTD 2500 4x4, Quad Cab, Big Horn Pkg. 3.73, airbags, 6sp auto, with Mag-Hytec deep pan.- sold but not forgotten.
--08 36' Jazz 5th wheel,triple slide, 12,000lbs
--28' 22,400# PJ goosneck beaver tail trailer
--95 & 96 5.9CTD 4x4 5sp. ext. cab. 33x12.50x16 front, 33x15.50x16 rear tires. R-1 tread, wheelbase shortened 30". Used as tugs on farm
--81 IH 1800, DT466 210hp, 10 speed,
--95 FL70, 8.3 cummins 275hp, 10speed
--79 GMC 7000, DD 6V53 210 hp, 6sp ally
-- A whole bunch farm equipment, all colors
singles club # 198
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post #4 of 5 (permalink) Old 06-15-2015, 02:50 AM
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Those temps are chilly on a 6.0. We easily see 215 and as high as 230 oil temps on our engines. I think the flash point is around 250 so you are no where near the danger zone. I would agree it's an economy, emissions strategy to keep things hotter.

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post #5 of 5 (permalink) Old 06-15-2015, 02:02 PM
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My coolant temp can reach as high as 210* on a hard pull, but Im one of the lucky ones with a 200* tstat. No oil temp gauge yet,on my 12. The reason you see higher temps than normal is due to emissions. Mike you will have warning lights when oil temp is out of range. However, I do not believe you are anywhere near the danger zone as Wes stated 6.0s run HOT.


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Last edited by neeltburn; 06-15-2015 at 07:18 PM.
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