Your car’s air filter is also not ratted or even capable of trapping such fine silica, it will get past it like smoke through a screen door. Once inside the engine some inevitably get on to that nice wet sticky surface where the oil film is inside the cylinders. Then it will grind ,rings ,bearings and valve stems into ruin. Your oil filter is not rated to capture these sized particles either. They are small enough to get past a OEM grade filter but still large enough to kill bearings and rings nasty little problem with single digit micron sized particles.
Almost no one has submicron bypass oil filters on their vehicles and even then they only filter 25% capacity per hour it’s bypass trickle ffiltering not bulk flow.
Wouldn’t an oil bath filter work better for that?