Has anyone tested the difference between silicone and nitrile in the different seasons. I would think silicone would be advantageous both in summer and winter. Silicone should have a less chance of hardening from heat and from cold. But, I see a lot of manufacturers of oil filters, including Wix, using nitrile on a lot of filters. I have all silicone ADBV filters. But, is there really any reason to not use nitrile?