Originally Posted By Cab_Burge
Not true about the lead additives wearing motors out, that is a bunch of horse pucky spouted by a lot of the enviormental haters tsk If you go back to the engines made originally in this country for our cars and trucks before the lead additives where being used in the fuel the motors needed valve and ring jobs long before 30,000 to 50,000 miles scope The lead additives added to the gas stop the need for the valve jobs and also help increase the ring life along with better valve life thumbs The lead additives, Tetra Ethel (SP?) was a lubricant for the valve seats and cylinder walls that reduce metal to metal wear, it didn't increase the engine wear scope
lead and other metallics due wear engines out. i doubt that the intended introduction of "lead" in gas was a valve seat lubricate but more of an octane boost. before lead compression ratios were stuck in the 7:1-8:1 max. as compression ratios increased during the fifties more lead was dumped in the fuel. non-detergent oils were a big factor in engine failures prior to detergent oils which were developed around the same time as "ethyl" was introduced. but, believe what you want.