Diesel oil is not Octane rated it is Cetane rated.....how would that help valve seat life?



LEAD SUBSTITUTE is a safe and
effective valve seat protection additive which is
designed for use in engines which require the
protection of lead. Tetraethyl lead was originally
designed as an octane enhancer, but it was soon
discovered that the metallic oxides which result from
combustion form a protective coating on valves which
prevent microwelding of the valve seat to the valve
face under high temperature operation. This welding
of the two hot pieces of metal causes the removal of
the softer seat metal and subsequent recession of the
valve into the cylinder head. Wear debris then
contributes to valve stem and valve guide wear. Valve
recession causes poor sealing of the compression
gases, which means loss of power and fuel economy,
poor idle and driveability, and the eventual need for
cylinder head replacemen