What’s the point with the golden car?

It seems like the only point of the golden car is the advertising exposure opportunity. I try to save it for last or close to last but can’t always.

Try to leave the Golden Car to the last. The Multiplier will apply to the total (including the 100 for the car) and it won't disrupt the game. Even if the golden car is impossible to be last, it still works if all the cars are on the way out before it exits the gate.

That's what I do. Even with 6 cars left it didn't disrupted the game.

Move the golden car out of the parking lot last or with the last few of the cars and it won’t disrupt your game.