For most folks, a diesel truck with 300,000 or 400,000 miles is already something to brag about. But for Roger, the proud owner of a 2006 Chevrolet LBZ Duramax, that kind of mileage is just a warm-up.

His truck, which was proudly showcased at the Ultimate Callout Challenge, has racked up a jaw-dropping 1,197,524 actual miles—and it’s still running on the original engine and transmission.

The Odometer Can’t Even Keep Up

While the truck’s odometer only shows 197,000 miles, there’s a reason for the discrepancy. As Roger explains, once the truck hit 999,999 miles, the factory instrument cluster threw an error. A dealer reset it, but that mileage doesn’t reflect the full story. This rig is already deep into its second million.

Built to Work, Not to Show Off

Roger is the truck’s second owner, having picked up the two-wheel-drive Duramax in 2017 with just 142,000 miles on the clock. “I bought it strictly to pull Airstream travel trailers all over the country,” he says. “I knew I was going to keep it a work truck, so I kept it original.”

And original it has remained. Roger’s approach has always been function over flash. He’s refused to tamper with the powertrain, opting instead for a meticulous maintenance routine.

The Secret? Maintenance and Restraint

What’s kept this Duramax alive and kicking for more than a million miles? A rock-solid maintenance regimen. Roger uses AMSOIL synthetic oil with extended 20,000-mile oil change intervals, backed by regular oil analysis to ensure everything stays in spec.

He’s also kept the truck 100% emissions intact, a deliberate decision to avoid hassle during DOT inspections while hauling across state lines.

The result? That LBZ engine fires up without a hint of blow-by at the oil cap. Oil consumption is nearly nonexistent—just half to 3/4 of a quart every 20,000 miles.

Original Turbo, Clean Frame, and a Ton of Braking Life

At 350,000 miles, Roger proactively replaced the injectors and CP3 pump, but get this—the turbocharger is still the factory original. He also regularly gets over 100,000 miles from a set of brake pads, thanks to the Allison transmission’s grade braking, which spares the pads from wear on long downhill grades.

Even more impressive? The truck has lived its life in the rust belt, yet still sports a clean frame and body—a testament to how well it’s been cared for.

Million-Mile Man with No Plans to Quit

Now 70 years old, Roger chuckles when asked about what’s next. “I keep saying when the truck quits, I’ll quit. But I’m afraid it’s going to outlive me!”