Redline 5w-40 vs Redline 10w-40 Specs

[heeltoe]

Per the Redline website, the 10w-40 has a lower viscosity than their 5w-40. What's up with that? Am I missing something?

................5w-40 10w-40
Vis @ 100c, cST 15.1 14.6
Vis @ 40c, cST 94 93
HTHS 4.6 4.7

http://www.redlineoil.com/pdf/4.pdf

 

[CATERHAM]

The 5W has more VII in it's formulation hence the slightly higher kinematic vis' and slightly lower HTHS vis'.

 

[buster]

They also have a 0w40 as well.