Lubricant Technical - API CJ-4 FOR HDDEO! When considering formulating your own diesel engine oil, there are many factors that come into play. First, understand that the CJ-4 formulation places limits on
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ExxonMobil Introduces Heavy Duty Diesel Engine Oil Formulations to Meet API'S CJ-4 and CI-4 PLUS Specifications; Newly Reformulated Mobil Delvac 1300 Super Exceeds Requirements for API CJ-4 Diesel Engine Oil Specification
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