RNG meaning in General ?

Ford Ranger is a nameplate that has been used on multiple model lines of vehicles sold by Ford worldwide. Primarily in use for light trucks, the nameplate has been used for distinct model lines of vehicles worldwide since the 1983 model year. In North America, the Ranger is slotted below the F-150 in the Ford light truck range, serving as the smallest pickup truck marketed by the company. In markets where the F-Series and Super Duty trucks are not marketed by Ford, the Ranger is typically the only Ford pickup truck offering.

In the Americas, the model line is currently in its fourth generation, derived from the third generation of the Ranger marketed worldwide since 2011. Initially developed by Ford Australia, the current Ford Ranger T6 is the first version sold as a mid-size pickup truck.