Do all engine oils have zinc for lubrication?

Not all engine oils contain zinc; however, many high-performance and older engine oils do incorporate zinc dialkyldithiophosphate (ZDDP) as an anti-wear additive. Zinc helps protect engine components, particularly in older engines that require additional wear protection. Some modern oils, especially those designed for newer engines with catalytic converters, may have reduced zinc levels to meet emissions standards. Always check the specific formulation and specifications of the oil to determine its zinc content.