[rondeo]

Torque spec for filter is 15 Nm (Ford manual) so not very tight.

Does it not need to be tighter because it's restrained by the plastic clamp or it shouldn't be tighter because it might break?

I recently bought 20l Fuchs Titan DCTF for $380, compare this to the Ford dealer equivalent price per litre for fluid only of $1080 I paid in 2013.