There are lots of "conspiracy theory" out there who have never done any engineering or science who revel in trying to prove every oil filter is exactly the same and we are being robbed blind.
Some even cut them up to prove their point although they have absolutely no idea of what they a looking at.
Thus a lot of people think it is fine & dandy to walse into the cheapest parts shop & buy the cheapest one that will screw on.
Like cheap & nasty wine obviously bigger has to be better which is obvious if you have no idea what you are talking about.
It costs money to do things like print correct fitting instructions on the side of the filter, along with your name & the product identity code.
So which one looks like it was made in Nowhereastan by the "We Have No Product Liability Insurance" oil filter & tea cosy company to you.
And which one looks like it was made by a company concerned about the end user ?
