Sorry, but LOL. Having replaced literally hundreds and hundreds of them on cars etc in the past I'd stop using them for consumption immediately I have a proper beer one for sale for $15. Thats 2.5 of those and reusable untold times. It's good to see ideas and options and yours, in theory, are great but not........optimum.
I use it inline to transfer one keg(pressurised) to drinking keg under co2 pressure, as for oil in them I am unaware, but I have been using successfully for a while now. I clean the line and run water and sanitizer through them after each use, I usually use the one for about 10 kegs. As cube said he has replaced hundreds, but that is in cars in fuel conditions, not under beer transfer with low co2 output (about 8) .Anyhow just saying works for me