What's the worst canister oil filter on the market?

[oil pan 4]

That is quite the filter. Injector Dynamics only calls for 5-10 microns for their high end injectors.
Wouldn't it be easier to filter the fuel before you put it in the tank?
What is the micron rating on the fuel filters you see on the commercial gas pumps?

Yeah I'd probably dump it through a lint free cloth rag.
The difference is used combustion grade oil is going to have a lot of dirt and metal in it.
Fuel is normally clear and clean has hardly any dirt.
Combustion grade oil is going to be loaded with dirt and metal down to whatever the filter is rated at. That's why I go so small.