Hey everyone, I think I finally comepletely rid my 92 x of its annoying valve clatter. Heres what I do: 1. Use only high quality 87 or 89 octane fuel from a quality gas station. (I use only Shell, Mobile, or Citgo) 2. Use Prestone fuel injector cleaner every 3000 miles 3. Use Restore engine oil additive every 6000 miles. I can mash the gas pedal into the floor at 75 going up hill and still remain valve clatter free. I'm very excited about beating the valve clatter. It was driving me nuts and gave my "anti-ford" friend a reason to hold his beliefs. Hope this post helps someone.