Castrol GTX 5W20 specs

[bob_ninja]

I am having a hard time with Castrol GTX 5W20 specs. I search here and at
Google but couldn't find any info.
Castrol site
For comparison I looked at FomulaShell 5W20
Shell site

40cst 56.1 vs 47
100cst 9.1 vs 8.3

So far it is looking like a thick 20, fine.

CCS@-30 6600 vs 4890
MRV@-30 60000 vs ?

Huh? I can see CCS is the same as for GTX 5W30 as they are both 5W. But MRV is
much higher than for GTX 5W30's 40000. It is equal to GTX 10W40 and 20W50!?!?!
Also its CCS is only slightly lower than for GTX 10W40?!?!

So this is a very thick 20? It is horrible for winter? Better for summer?
What do you make of these numbers?

 

[427Z06]

Quote:

---

I am having a hard time with Castrol GTX 5W20 specs.

---

Note that it says "Max" on the Castrol PDS, it may actually be less.

Just the same, I hate the corporate secretiveness. Very few are willing to let their product sell on it's merits, they rather razzle dazzle you with multi-million dollar TV ads.