Todd, I recently tried Seafoam in my '99 Taurus w/Vulcan motor and 60,000 miles and I liked the result. I put a can in the gas tank and used the PCV vacuum to suck another can into the motor directly. I feel the car idles more smoothly and seems to have better throttle response, I know these are subjective observations and not scientific measurements, but at least I know it didn't hurt anything. Anecdotal evidence suggests that Seafoam may be one of the few products of its kind that actually DOES what it claims...