Doing Some Baseline Maintenance

[79jasper]

Little less finicky system, but worst I ever got running dino 15-40 was loping on startup with my 7.3.
That would usually happen once Temps got below 20°F or so.

Now obviously synthetic will act better.
You'll be fine.

Sent from my SAMSUNG-SM-G935A using Tapatalk

 

[troutwest66]

Thanks for the replies. I went fly fishing yesterday up the North Fork of the Coeur d'Alene River. One pass to go over on I-90, 5-6% grade, then 50 miles up the river. A bit over 100 miles one way. Truck ran great. We camp up this river, too, so when school is out I can't wait to hook up the TT, load up the quad and go!

 

[carbonation]

5w40 is fine, especially in frigid temps. One caveat, the 6.0 will shear that 40 weight to a 30 weight in about 3000 miles. Just the nature of the beast. A 10w30 will stay in grade much better in the 6.0 . If your temperature range will let you, any of the current 10w30's are excellent oils, very stout, and will likely cure that cold start romp as well. LubeGard Heavy Duty diesel has a good dose of moly and boron in it, along with an ester base for cleaning, and is just about as good as it gets for the 6.0. Moly and Boron are the darlings of the popular adds like Rev-X and HotShots.

 

[bismic1]

The 6.0L does not necessarily shear a 40wt that quickly. Some oils hold up much better than others. My Mobil 1 TDT and Mobil Delvac 1 5W40 will shear to the TOP of the 30 wt range (12.5 cSt) in 5k to 6k miles (end even at 7.5k it is about the same as a virgin 10W30 - 12 cSt). Schaeffer 9000 resists shearing even better.

Rotella T6 will shear to the top of the 30 wt range in about 4k miles.

I do believe that the later model HPOP's (piston design) shear the oil a little more than the early ones (swash plate design).

I also believe that the rate of shearing increases w/ higher engine load.

10w-30 plus 50 John Deere CI-4 oil viscosity at 7.5k miles can be as low as 10.5 cSt.

Rotella T5 10W30 shears even more.

 

[troutwest66]

I'm due for a change in about 200 miles and it looks like the Delo 400 LE is no longer made but the replacement is Delo 400 XSP and is the new CK-4 rated but says on the website and the jug that it is fully compatible with the earlier ratings such as CJ-4. I just bought 4 gallons at Wally World at $20.84 each. My obvious concern is the spool valves in my injectors since they have less than 10K on them. Anyone see anything saying we shouldn't use it in the 6.0?

 

[troutwest66]

I saw that the CK-4 rating is a no go and Delo 5W-40 400LE looks to be discontinued. Exchanged the new Delo for Rotela T6 today and heading out to change it. I hate it when something that works and you trust gets discontinued.