Ozark pushes drain intervals to 75,000 miles with delo

Memphis-based Ozark Motor Lines is an irregular-route truckload carrier serving customers across the continental U.S. Founded in 1961, the company today operates a fleet of over 700 tractors, but is still a family-owned company run by the sons of its founders. A rigorous maintenance program is critical to Ozark’s on-time delivery performance, which is ultimately the key to the company’s success and longevity.


Since 2003, Ozark has relied on Delo® heavy duty engine oils. In previous years, the maintenance crew performed oil changes every 25,000 miles. With Delo, however, they gradually increased drain intervals. Now, with the Delo 400 SAE 5W-30 full synthetic, they are going as long as 75,000 miles between changes – and considering going to 100,000 miles. Using Delo, Ozark is confident its trucks can go a million miles.  Watch there story below and see how a Detroit Diesel 15 engine looks after 435,000 miles on Delo.

Ozark Motors

Ozark Motors
Shawn Whitacre
Shawn’s career spans nearly 20 years focused exclusively on research and engineering dealing with heavy-duty engine lubricants, fuels, and materials. Before joining Chevron in 2013, he spent 12 years leading global fluids and materials engineering activities for Cummins. He also spent five years conducting lubricant, fuel, and emission research for the Department of Energy’s National Renewable Energy Laboratory in Golden, CO. At Chevron, he is a Senior Staff Engineer primarily responsible for product formulation of the Delo Brand of Heavy Duty Engine Oils. He is currently the lead formulator responsible for development of Chevron’s PC-11 product line upgrade. Whitacre is the new chairman of the ASTM Heavy-Duty Engine Oil Classification Panel, which is tasked with the final development of the Proposed Category 11 (PC-11) requirements that take effect in late 2016.

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