CAT TO-4(M) vs engine oil and API GL4 fluids

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Quotes dated 11 Dec 2015.
Originally Posted By: zeng
Originally Posted By: miniac007
- I cannot find any TO-4 multigrade available here, and I don't want to change between 10w and 30 every seasons...

TO-4 by specifications , are generally newtonian fluids without addition of VII's for shear-stability that is of great importance in power trains. There isn't any non-newtonian multigrade TO-4 , IIRC.
Originally Posted By: miniac007
- An 5w30 UTTO (UTF) will be OK in term of viscosity but has friction modifiers, and it is not TO-4 only TO-2.

A 5W30 UTTO is not TO-4 certified because it comprises of VII's required for ultra low temperature regimes , despite of the high probability of it having full set of appropriate additive systems for powershifts ..... TO-2 used to permit VII's , hence shorter clutch wear life if it's not shear-stable.

http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3943502/Re:_ZDDP_based_VS_ashless_hydr#Post3943502
 
Multi grade TO-4 lubes have been around for a while. Petro-Can has both a 5w30 and 0W20 equivalent, and Chevron's Torque Force MP looks like a 10W40, or there about.
 
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