Castrol GTX SynBlend 10W-40 is uber thick

[Finklejag]

It's looks like Castrol has posted their new Data Sheets for the GTX SynBlend oils. The new SN spec is on it.

It looks like they added more information compared to the old ones. I was suprised to see the SN SynBlend 10W-40 is thicker then the High Mileage 10W-40. The SynBlend has a cst @ 100c of 16.2

Is this the thickest 40 weight on the market?

Castrol GTX SynBlend Data Sheet

 

[dave1251]

It will just shear down to a lighter 40 weight or 30 weight.

 

[webfors]

Originally Posted By: dave1251
It will just shear down to a lighter 40 weight or 30 weight.


I don't believe it would shear almost 4 cst @ 100c. It would be interesting to have some used oil analysis on it. Definitely a thick 40 weight.

 

[WagonBoss]

It might be one of the heavier 10w's, but it is absolutely the lowest HTHS I've ever seen for a 40wt. Must be a typo, eh.