Valvoline says that its Premium Blue SAE 15W-40 engine oil, endorsed and recommended by Cummins Inc. for its heavy-duty diesels, now exceeds the requirements of the American Petroleum Institute (API) Service Category CJ-4 spec for use in four-stroke diesels designed to meet 2007 emission standards. It’s backward-compatible and will also meet CI-4 Plus and CI-4 specs.

Premium Blue CJ-4 engine oil is designed to provide advanced lubricant performance in modern engines equipped with sophisticated emissions control hardware, including all types of exhaust gas recirculation, diesel particulate filters, and Caterpillar ACERT technology.

In addition to API CJ-4 performance, the new lube meets the requirements of all engine-maker tests — Cummins CES 20081, DDC Power Guard 93K218, Mack EO-O Premium Plus ’07, Volvo VDS-4 and MB228.3, and the proposed CAT ECF-3. Valvoline says engine manufacturers’ recommended drain intervals can be maintained in pre-2007 engines with the use of low- or ultra-low-sulfur diesel fuel. “Premium Blue customers can still enjoy the Cummins-approved extension of standard drains for Cummins ISX and ISM engines,” the company says.

Valvoline All-Fleet Plus SAE 15W-40 and Premium Blue Extreme full synthetic SAE 5W-40 will remain approved for API CI-4 Plus products until market conditions change. Valvoline All-Fleet Plus SAE 15W-40 has met the engine test requirements of API CJ-4.

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