I was not trying to clean the engine. Yes, if that was the intent I would have had a filter in there, and I would certainly NOT have run the engine with kerosene in it. I even removed the fuel pump fuses to be sure it did NOT run. I am aware there are all kinds of engine cleaner snake oils out there, but again, I wasn't looking for that. I was trying to resolve a low oil pressure issue/light. The process I outlined successfully did that. It dislodged the particles/debris that had clogged the pickup screen. There was NO kerosene in the oil filter housing after the process I did, so a filter did not matter. This tells me the kerosene did Not circulate though the oil system, which was the intent. Just wanted to clarify that as I am trying to help others who might have a similar situation. The car has been happily motoring for a cross country trip/5000+ miles since with no oil warning message.