Pennzoil meets EO-N spec
Pennzoil Long-Life heavy-duty engine oil has been approved for the new Mack EO-N Premium Plus specification. This spec exceeds a number of requirements of the new CI-4 classification from the American Petroleum Institute. According to Pennzoil, the EO-N Premium Plus spec is stricter than the CI-4 spec in four of seven engine tests and four of eight bench tests required to classify an oil.
Mack EO-N Premium Plus also requires Volvo VDS-3 approval, an extended-drain specification for Volvo engines. CI-4 does not require this.
For complete details, contact Pennzoil-Quaker State, PO Box 2967, Houston TX 77252-2967.