I was just wondering if any of you know or had much experience with oil additives such as Slick 50 or Nulon (the ones that claim 80 000km protection. I put slick 50 in my 4age a few years ago and the engine doesn't seem to have deteriorated but I do oil change every 5k. Has anybody done any studies on these or have any info?, there seems to be some negative feedback about such companies in this business. Is it possible for the PTFE to coat the cylinder bores with a thin layer...?
Thanks