pwede sir. kahit diesel pwede. in case of carburated engines or diesel it's just to improve the elctrical grounding para mas maganda charging ng alternator at fully grounded ang starter motor. plus better grounding for the ignition system for the gas engine. ang connections will be sa alternator, engine block, car body and battery negative terminal lang, wala na sa intake manifold.

sa efi and auto tranny it gives better performance for the ecu.