In the 1970ís the EPA recognized the affect of leaded gasoline on the environment and public safety.† In response, refineries were required to gradually eliminate the lead in gas by the end of 1995 (from 3+ gram/gallon to zero) One benefit of lead in gas was that it acted as a cushion between the exhaust valves and the valve seats-controlling the problem of valve recession. When the fuel burned in the cylinder it created a lead oxide (powder) and as the exhaust was pushed out of the cylinder the oxide coated the exhaust valve and seat which provided the barrier cushion that protected them.†
New engine valve seats have been hardened to avoid this problem, but older model engines were designed for leaded fuels. These vehicles need a quality lead substitute.† PFS Lead Plus also creates an oxide which coats the valves and seats and provides the protection that you need to avoid premature valve recession.† Simply by adding a lubricant to your fuel, can only give slight protection against this problem. When the fuel ignites and burns, it burns the lubrication away at the same time.††
Hard working farm and industrial equipment are especially susceptible to valve recession and should never be run without a quality lead substitute. You may not have had a problem with valve recession now in your older vehicles but it will eventually come to pass if you do not take steps to avoid it.† PFS Lead Plus lead substitute is designed to give you the lead protection your vehicle needs. It does not contain lead and combats the same variety of fuel problems that Gas Plus does including water removal, carbon build up and fuel system deposits.