The three-cylinder, 10.6-liter engine will be placed in one of Walmart’s Peterbilt 579 trucks to haul goods in Southern California.

Although the engine has been tested in labs, its use in the Walmart truck will be its first on-the-road test, said Karen Caesar, information officer for the California Air Resources Board’s Southern California office.

The truck will be in service starting in July and will run for at least three months, said Larry Fromm, executive vice president of business development for Achates Power Inc.

“Transportation, of course, is essential to human health and prosperity, but it comes with harmful side effects,” Fromm said. “Walmart has been a leader in investing to reduce the harmful effects of transportation. This project is another example of that.”

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This article originally appeared May 26, 2021, in the Northwest Arkansas Democrat Gazette