Re: ring free
I wouldn't beleive what the dealer said. That makes no sense, other than indicate he wants you to buy that stuff from him forever. It is about $1 and ounce! Fortunately if the motor isn't already carboned up, you can use only 1 oz per 12 gallons of fuel. I'm going to start using it in my 4 year old F60, on top of Seafoam and/or Stabil.
Joe