Cold Weather Oil Waterfall

[300DFarmer]

Here's a puzzler.
On my wife's '82 300D, I just experienced the second occurrence of starting in cold weather (0F) and looking under the hood to find oil cascading down the oil filter housing. I am using a Meile filter and new o-ring, and have torqued to the recommended 25nm.
Admittedly, the first time this happened, I had to over-torque slightly in order to stop the leak.
This time, the o-ring was slightly squashed, and I had to replace it with a new one from a new filter. Torqued to 25nm, and so far now leak.
Has any one else experienced this? It's a real drag to have to out there dealing with this at low temperatures when my wife if trying to get to work.
I am thinking of trying to source a larger diameter o-ring as a replacement to prevent this from happening again. My thinking is that extreme cold causes constriction of the rubber that compromises the seal. Has anyone tried this and/or where I could find a larger diameter o-ring?