I was about to sell my old Honda CRV due to massive amounts of smoke and rough idle, I had a fresh oil change and it got worse, I looked for anything and found your product in my local parts store 'supercheap' and thought it cant hurt. I put the whole bottle in and went for a drive around 3 hours, still smoking a small amount but after 3 days now no smoke and the idle is perfect! Some how it has more power and my fuel usage is much better. Not sure if your product is witchcraft or what but MY GOD DOES IT WORK!!!