The really offensive part of this kind of thing is that you already paid for it. Like if you wanted to buy a regular car and you could get the engine with turbo then those are two different cars. The latter costing more because it has more/better stuff in it. This is all fine and good.
In this case, all the cars have turbo and you pay to have it turned on or not. The cost of the turbo is in the cost of the normal car because the company would not sell it at a loss. You already paid for it, but aren't allow to use it. So you are driving around with this perfectly good and usable turbo that you paid for and can't use unless you paid some extra extortion money. This is abusive, wasteful, and should be illegal in my opinion. You should only be charged extra if it is in fact extra. Not something that is already there and withheld.
In this case, all the cars have turbo and you pay to have it turned on or not. The cost of the turbo is in the cost of the normal car because the company would not sell it at a loss. You already paid for it, but aren't allow to use it. So you are driving around with this perfectly good and usable turbo that you paid for and can't use unless you paid some extra extortion money. This is abusive, wasteful, and should be illegal in my opinion. You should only be charged extra if it is in fact extra. Not something that is already there and withheld.