And still another that says it should be on the right because if you run out of fuel you are away from other traffic while refueling.
In truth cars are designed for the entire world. Designers will switch the steering wheel side for the country, but they will avoid having to make changes to something far away there that doesn't need to change.
The bottom line is that there are weak preferences, weak arguments for right vs. left (or clockwise vs. counterclockwise), and generally weak design asymmetries/constraints for a given situation and you end up with a majority (but by no means universal) choice.
Not saying that's the case related to the OP, but it seems reasonable absent specific evidence to the contrary.
In truth cars are designed for the entire world. Designers will switch the steering wheel side for the country, but they will avoid having to make changes to something far away there that doesn't need to change.