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6.7 hot engine oil???

 
  #46  
Old 09-04-2015, 03:54 PM
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This report is with 15-40WT . This first one in the other column was factory oil 10-30.


15-40 is better for me and it shows.
 
  #47  
Old 09-04-2015, 04:09 PM
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Originally Posted by senix View Post
This report is with 15-40WT . This first one in the other column was factory oil 10-30.


15-40 is better for me and it shows.
I am assuming all full synthetic?

Once again thanks for posting!
 
  #48  
Old 09-04-2015, 06:07 PM
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I pulled my 17K toyhauler through the mountains with an additional 1000 pounds in the bed (not counting the pin weight). I reached an oil temp of 240 three times and the fan came on full force each time and lowered the temp immediately.
 
  #49  
Old 09-04-2015, 06:08 PM
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Originally Posted by buzybraza View Post
I am assuming all full synthetic?

Once again thanks for posting!

No...factory oil is the dino and my oil that I run is the motorcraft dino oil as well.
 
  #50  
Old 09-04-2015, 06:14 PM
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I also run Motorcraft dino oil.
 
  #51  
Old 09-04-2015, 07:12 PM
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Originally Posted by senix View Post


This was the last sample I pulled. It was a 4K or so mile towing my 5er in those nice summer temps through the rockies no less.


I saw up to 248F oil temps for long periods of time.


oil stood up just fine

Scott - what oil were/are you using? Your long trip in some ways is similar to what we are doing though aren't doing the Rockies but the Wasach and Sangre de Cristos with a 77500 mile truck and 4500 miles so far on this trip since 17 August with another 3-4000 to go. I may send a sample of the Motorcraft 15W40 off to Blackstone for that late line in the sand on to be an 80K+ engine
 
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Old 09-04-2015, 07:15 PM
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Oooops - very slow 'net here in Cedar City, UT KOA. Question answered
 
  #53  
Old 09-04-2015, 07:18 PM
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Just the motorcraft 15-40Wt oil. Same oil I used in my 6.4 and it always held up good on the 5K oil change intervals I run.


I do think it would go the 3--4k more you have for your trip though.


Running my Monarch pass and on I 70 thru the eishhower tunnel and several other long grades is a heck of a workout. Especially when you have your foot thru the floor.
 
  #54  
Old 09-04-2015, 07:40 PM
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Originally Posted by senix View Post
Just the motorcraft 15-40Wt oil. Same oil I used in my 6.4 and it always held up good on the 5K oil change intervals I run.


I do think it would go the 3--4k more you have for your trip though.


Running my Monarch pass and on I 70 thru the eishhower tunnel and several other long grades is a heck of a workout. Especially when you have your foot thru the floor.
I will most likely do the oil change at the end of the trip. I did the totally useless look/smell/feel test this morning and it still looks good.

That Colorado portion of I-70 can be a challenge though I do believe that Utah has some l-o-o-o-g 6-7% grades that are about as bad. We were able to 'blow' past lesser RV combos with ease. The last time I did the CO portion pf the route was in a foreign made underpowered rent-a-clunk on a ski trip though I did run my ancient 460 F350 with a 30' fiver along the route as well many years back.
 
  #55  
Old 09-05-2015, 10:13 AM
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Rotella T6 5W40. Runs around town 198-203, highway speeds 203-210, with the camper normal driving 210-215, long grades with camper 230-245. This doesn't bother me a bit because when it runs up this high it goes back down to normal operating temps in a matter of just minutes, the cooling system is truly amazing. Not to mention no regens when running hard.
 
  #56  
Old 09-05-2015, 11:19 AM
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Originally Posted by Thenewboss View Post
Rotella T6 5W40. Runs around town 198-203, highway speeds 203-210, with the camper normal driving 210-215, long grades with camper 230-245. This doesn't bother me a bit because when it runs up this high it goes back down to normal operating temps in a matter of just minutes, the cooling system is truly amazing. Not to mention no regens when running hard.
That is what I use.......

Reading the Diesel supplement book that came with the truck......for the cold winters and the hot summer pulling heavy (18K lbs) loads....the book lead me to use the 5W-40 synthetic. I'm sure, there is no one answer. my next choice would be the 15W-40 in the summer months and the 10W-30 in the winter......
 
  #57  
Old 09-05-2015, 02:41 PM
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Originally Posted by Sailor_Roy View Post
That is what I use.......

Reading the Diesel supplement book that came with the truck......for the cold winters and the hot summer pulling heavy (18K lbs) loads....the book lead me to use the 5W-40 synthetic. I'm sure, there is no one answer. my next choice would be the 15W-40 in the summer months and the 10W-30 in the winter......
That's what we run, lots of idle time in the winter. Always Motorcraft.
 
  #58  
Old 09-05-2015, 06:37 PM
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I'm with you Roy, the T6 5w40 fits all the conditions I run in and it's a little bit less expensive than the motorcraft. I tow 99% of my miles and change the oil when the truck tells me to. I think the 15-40 would be my next preference but honestly I don't see how it would really matter that much. I'm trying to get the best mpg I can and the lowest cost per mile I can, within reason.

I've never been able to get the oil above 242 I think, and I've tried.
 
  #59  
Old 09-06-2015, 08:53 AM
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The highest temp I have seen is 243 degrees.
 
  #60  
Old 02-11-2016, 12:00 PM
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Have any of you guys looked at the boost when the oil temp is that hot? Mine has a boost loss when under heavy load and the oil gets this hot. It falls to about 12 lbs of boost, and of course looses power when hot.

Thanks,
RSC
 

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