The latest addition to the Mack Trucks Historical Museum is this 1984 R Model tractor, originally custom-built for Johnny Prescott and Son Oil of Concord, New Hampshire.

Learn how a Mack Truck joined the ranks of the worlds most expensive luxury vehicles, what it likely cost to make it happen, and why it's so expensive.

Huffman notes that a Mack R-series tractor tanker was a key vehicle in “The Road Warrior.” In “Fury Road,” Mack takes a bow with an R-series wrecker.

Mack’s custom pickup version of its Granite will make a repeat appearance at a July 4th event in Pennsylvania. That’s Jack Mack, named for John (Jack) Mack, one of the founders of Mack Trucks.

In a statement, Stu Russoli, Mack’s highway and powertrain products marketing manager, said Mack builds custom orders daily — but not nearly to the degree of the sultan’s truck.

A custom Mack Granite snow plow model outfitted with all-wheel drive was built for Somerset Township, Penn., to deal with hilly terrain and windy roads in the area.

Learn why a Malaysian Sultan spent a small fortune on turning a Mack Truck into an expensive luxury vehicle and what it may have cost.