Is 10W-30 thicker than 10W-40?

[gnx7]

I've told a friend of mine that 10W-30 is thicker than 10W-40 and he doesn't believe me. I hope I'm right?

Can someone reply so I can quieten him down .

-GNX7

 

[BuickMike]

The higher the weight, the thicker the oil. 10W-40 is thicker.

 

[1970gsx]

The higher the weight, the thicker the oil. 10W-40 is thicker.

Yup.