Curious questions

[Chamberpains]

Those bars in the dash are set by the truck manufacturer. They can be adjusted to any rpm range. Do yourself a favor and ignore them or shut them off. Search this forum for hypermiler and things associated with driving styles. You'll learn how to properly use your equipment to move freight for profit instead of working the guts out of it by racing around and lugging the life out of the engine.

Know that small gains in truck operation savings in the right areas are huge by the end of the year.