By Mike Anderson, Senior Editor | September 28, 2010

API CJ-4To meet the new API CJ-4 service category for heavy-duty diesel engine oils, Shell has introduced Rotella T I5W-40 with Triple Protection technology, representing the largest formulation advance in Shell's engine oil technology in 30 years. The oil has also been approved for the new Caterpillar ECF-1-a and ECF-2 specs. According to Shell, the new Rotella T is providing on average 50-percent greater wear protection than the previous formulation in industry-standard tests, supported by more than 10.5 million miles of on-highway service using current-generation engines demonstrating lower iron wear.