Conversion costs about $140 per watercar4me.com and Water Fuel Expert. Is this real?
No, it is a fraud, scam, swindle. Many folks have tried it, all have been disappointed. Hold on to your wallet.
If I had a nickel for every time I saw one of these posts…
…well, I’d have other things to do than post here! 
You posted this same topic about 4 hours ago that was quickly deleted. I’m assuming it was deleted by the moderator because your wording in that post made it really clear that you were trying to sell something.
Fortunately this topic has been beaten to death enough times in this conference so that there’s little doubt in anyone’s mind about the scamming tricks behind these fraudulent pitches.