A long time ago I worked at a job where we used a lot of O-rings. What I found is that it was not unusual to find a new ont that had some defect on it.
Do a good visual inspection and stretch it a little. I has not happend often but I have stretch some a littie and them breake apart due to some interior defect.
Other problems are there is sometime pieces of rubber flashing from the molding process protruding from the O-ring or when you asseuble the item you cut off a tiny sliver of O-ring.
That being said as the other member said it is more likely that the O-rings in some filters are not exactly the right size. Companies seem to buy components from whoever happens to be cheaper at the time.
When I am in a hurry I occasionaly leave the old O-ring in on the Filter Cap. I have never had any leaks doing this. So you could pull a fatter O-ring from one of your other Oil Filter Kits and if it works just reuse it 1 time.
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84 300D, 82 Volvo 244Gl Diesel
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