500SEC (140.070) V8-5.0L (119.970) (1993)
destruction of the converter through the melting of the substrate material.
CAUTION: The use of leaded fuel must be avoided except in emergencies as it will permanently render the converter ineffective. The lead compounds
used in leaded fuels are deposited in the pores and on the surfaces of the active material, reducing or eliminating exposure of to the exhaust
gasses. Excessive engine oil residues can also poison the catalyst.