Mack extends oil drain intervals with new engine oil formulation

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Updated Feb 8, 2017

Mack Engine Oil Eos 4

Mack Trucks is extending its recommended engine oil drain intervals for users of the company’s newly formulated Mack Engine Oil EOS-4.5.

Depending on the application, oil drain intervals have been extended by up to 15,000 miles compared with previous formulations. Introduced as the factory fill in Mack’s 2017 engines, genuine Mack Engine Oil EOS-4.5 also extends drain intervals for all 2011 and newer Mack engines.

Scott Barraclough, Mack technology product manager, adds that Mack Engine Oil EOS-4.5 isn’t simply a rebranded version produced by other engine oil manufacturers.

“Nothing could be further from the truth,” he says. “Mack Engine Oil EOS-4.5 is a proprietary formula that is tested and approved with Mack equipment, which allows us to extend drain intervals.”

With Mack Engine Oil EOS-4.5, drain intervals have been extended to 60,000, 50,000 and 40,000 miles for long-haul, regional-haul and heavy-haul applications respectively. During the life of a truck, Mack says these extensions could allow customers to skip between four and 16 oil drains.

Available in 10W30 and 15W40 weights, Mack Engine Oil EOS-4.5 offers protection above and beyond the new American Petroleum Institute (API) CK-4 specification by requiring enhanced performance for oil oxidation and oil aeration control. It is also formulated with a lower viscosity, helping improve fuel efficiency, even under high loads and high ambient temperatures, Mack says.

Mack Engine Oil EOS-4.5 can be used anywhere API CK-4 oils are recommended and is also fully backward compatible with all API CJ-4 applications.