Has anyone ever had all 3 in front of them and compared materials and method of construction? I have and find that the Mobil 1 is a bit more innovative (proper seals where the other 2 just have hard, flat surfaces) and what appear to be silicone o-rings (red, soft) in place of Buna-N (neoprene) which is acceptable, but not as good as Viton. The silicone should remain more resilient at temperature but is NOT recommended for use with synthetic lubricants. I would presume they would first swell, then disintegrate.

I will email Mobil 1 and ask what the material of the included o-rings is before I'll use them. Surely they will tell me?

I have all of the correct sizes in Viton in the drawer. The filters look first-rate.

BTW-I'm asking this because, as someone else pointed out, Advanced Auto has a coupon in the local flyer for 5+ jugs or 5 quarts of any Mobil 1 oil (0-40 in stock. Wow!) plus a Mobil 1 filter (any) , (not in stock, Wow!) for $29.99. Limit of 5 per customer. I was told the Mobil 1 filter is $12.99 alone. I bought 5 and I figure I'm golden until ~ 2024.

Of course, I'll have to wait until Tuesday for 3 of my filters. And a hamburger.