Product Review

Marvel Mystery Oil is the original oil enhancer and fuel treatment that provides a multitude of benefits to engines. Added to gas it cleans and lubricates fuel injectors and carburetors, improves gasoline mileage, extends spark plug life, reduces and prevents varnish and gum build-up. Added to oil it prevents valve sticking and clatter, fortifies properties of engine oil, prevents breakdown caused by extreme temperatures, reduces and prevents acid and sludge formation and promotes easier cold weather starts. Marvel Ultimate Fuel & Motor Treatment takes everything that's great about the original MMO formula and applies it to cars with GDI fuel tanks and hybrid vehicles.