excerpt from the above article:
He uses no magnets, no precious metals, nor exotic gasses; in fact, he has made no mechanical modifications or enhancements at all to the engine or the truck. It's an off-the-shelf 2010 Freightliner Cascadia with a 72-inch raised roof sleeper powered by a stock DD15 engine rated at 455 horsepower and 1550/1750 pounds-feet of torque. His trailer is a run-of-the-mill Utility dry van with about $3,000 worth of aerodynamic trim, including a NoseCone and Sideburns and a set of Fleet Engineers side skirts. He runs Michelin X-One tires on the drive and steer positions and Michelin XZA3 on the steer axle.
Operationally, Henry is fastidious about driving efficiently. He very deliberately runs 64 mph to optimize the engine speed at between 1,375 and 1,400 rpm -- a critical factor in preserving fuel economy. According to his ECM, his average road speed over a month ranges from 56.7 to 59.5 mph.
https://www.truckinginfo.com/tags?tag=Fuel+Economy
https://www.truckinginfo.com/tags?tag=Fuel+Economy
https://www.truckinginfo.com/334758/for-better-mpg-drivers-should-focus-on-factors-they-can-control
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