Product: Royal Purple 83456 Diesel Motor Oil 10W30 HD CI/4, 1 Gallon
Brand: Royal Purple
Keeps internal engine parts cleaner than detergents alone
Superior oxidation resistance also greatly extends drain intervals and minimizes oil degradation
Duralock Ultra motor oil is recommended for use in both two-cycle and four-cycle diesel applications
Part number: 83456

Search query: royal purple 15w40 diesel oil synthetic
Relevance: Substitute