Is it Islamically permissible for car rental companies to stipulate that the renter not use the car for more than one hundred kilometers per day?

The scenario mentioned in the question is a rental agreement that combines duration and work, and the majority of jurists hold that this invalidates the contract. If the rental agreement is invalid, then the lessor is entitled only to the equivalent customary wage (ajr al-mithl). This is the view of the Hanafis, Malikis, Shafi'is, and Hanbalis. However, Abu Yusuf and Muhammad ibn al-Hasan from the Hanafis, and Ahmad in one narration, considered the rental agreement valid, holding that the subject of the contract is the work, and the mention of duration is merely for expediting it. The majority of jurists, however, maintain that this combination invalidates the contract, unless its sole purpose is to hasten the hirer or to preserve the animal.