I'd love to try the water approach, but I'm scared to do it. I've been using Seafoam instead for a few years. All it does is smoke the living hell out of the neighborhood. I get a good giggle out of it when I start driving. I haven't noticed the pinging getting any better though. If I could inject the Seafoam from a button on the dash to give a smoke screen as needed during my commute I'd be a happy guy.