The spark plug gap for a 1993 Mercury Sable with a 3.8-liter engine is typically between 0.054 to 0.056 inches (1.4 to 1.5 mm). It's important to check the vehicle's owner manual or service guide for specific recommendations, as variations may exist based on engine specifics or modifications. Always ensure that the spark plugs are properly gapped before installation for optimal engine performance.
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