Pennzoil complies with stringent Mack EO-N test

Pennzoil Long-Life Heavy Duty Engine Oil has been approved for the new Mack EO-N Premium Plus specification. With the approval, Pennzoil becomes one of the first diesel engine oil marketers to receive the new rating.

The Mack EO-N Premium Plus spec exceeds a number of the requirements of the new CI-4 classification from the American Petroleum Institute, according to Mike Monarchi, Pennzoil product manager for heavy duty engine oils. 

“While the CI-4 classification was developed specifically to meet the higher demands of lower-emission 2002 diesel engines, the requirements for EO-N Premium Plus go well beyond that and are the most stringent for diesel engine oil in North America,” said Monarchi.

Monarchi said the EO-N Premium Plus spec is stricter than the API CI-4 spec in four out of the seven engine tests and four out of the eight bench tests required to classify an oil. In addition, Mack EO-N Premium Plus requires Volvo VDS-3 approval, an extended drain specification for Volvo engines. API CI-4 does not require this.

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