Champion “Classic” Blue Flame Performance Diesel Oil is a unique, hybrid synthetic blend 15W-40 diesel engine oil that combines workhorse high-zinc performance additives, superior protection, advanced polymer technology, and high TBN, supported by a carrier blend of synthetic and conventional base fluids. Performance diesel owners have reported decreased cylinder, cam, and bearing wear in their early model engines, especially in competition diesel engines. Development of this oil focused on the concentration and synergistic behavior of anti-wear and detergent additives in an effort to obtain more robust protection at high temperature and heavy load.