Hard use oil help

[UncleDave]

The M1 is not very shear stable - II would guess the 10-30 is more shear stable.

Ow-40 shears out of grade in my titan in about 5K but it has lots of chains and valves,

It also shears out of grade in 20 hours of marine use in my Ilmor 710.

UD

 

[OneEyeJack]

Either oil. I'd spend more effort checking tires, cooling system, transmission and brakes.

This truck is more than capable of handling the trip and the load.

 

[UncleDave]

Originally Posted By: A_Harman


Yes, this. The 2500HD would have the iron block 6.0. The 6.2's are aluminum block, and only come in the 1500's. Make sure the oil is dexos-approved. I would prefer a full synthetic 5w30, like Mobil 1. Mobil 1 0w40 FS is not dexos approved.


Makes sense on the block thanks.

I dont think anyones 40 grade is demos approved from what I can see

http://www.centerforqa.com/dexos-brand1/

UD

 

[BrocLuno]

I would not be concerned about either oil

But, I'd look at adding some fiberglass spark-plug boot "socks". Any speed shop can supply them. They'll just slip over the plug boots. But, they'll keep the cherry red manifold heat off the plug boots and wires enough that she will not toast one

 

[Linctex]

Originally Posted By: Olas
Accelerated wear happens when the new detergent washes away the old add pack, before the new stuff has has the time to settle in.


There is the SAE research paper concerning this issue, but it seems that in real life, there's little to be concerned about.

 

[BrocLuno]

A fairly clear discussion addresses this concept of stripping and it's non-importance in Post #4438071, on Page 5 of this thread: https://bobistheoilguy.com/forums/ubbthreads.php/topics/4432777/1

 

[WiskyBadger]

Originally Posted By: Jetronic
Originally Posted By: Vlad_the_Russian
Originally Posted By: ChevyBadger
Either would be fine. I would run the 10w30 and save the 0w40 for colder temps.
0w40 will protect better in higher temps, and it will pump better in lower temps. So if 10w30 loses in both departments - why use it?


how much does it loose at high temps?

And how much do both oils shear? It's not like M1 is the most shear stable oil....
This is why I'd use the 10w30 for warmer temps, if the 0w40 is down to a 30 in the winter a 0w30 is perfect for colder temps.

 

[SilverFusion2010]

Try some maxlife 5w30 in red bottle. It should be dexos approved, and it will be a little thicker.