I can easily refute 3/4 of that but I'm tired right now. Simply put, not so in my world, even analysis results in a guess. Completely and totally unnecessary. You will always get some leaching and dilution, impossible not to. No guesswork there.
Save thousands? I don't even spend thousands, I'd be hard pressed to save hundreds. You got me generating cash now. Actually I do, I save drained oil to use for other things, $2.50 a quart you know.............
You guys worry way too much about things that impact you way too little. You'll figure that out in another twenty or thirty years just like I did.