Which coverage should Mark purchase to get liability protection when driving someone else's car?

To obtain liability protection when driving someone else's car, Mark should consider purchasing Non-Owner Coverage. This type of coverage is specifically designed for individuals who do not own a vehicle but occasionally drive vehicles that belong to others. Non-Owner Coverage provides liability protection, which means that if Mark is at fault in an accident while driving someone else's car, this coverage will help cover damages for injuries or property damage to others, thus protecting him from potential financial liability.

This coverage is particularly important for those who frequently borrow or rent vehicles since personal auto policies typically extend liability coverage only to the named insured and their vehicles. Therefore, Non-Owner Coverage ensures that Mark is adequately protected while driving vehicles that he does not personally own, addressing potential gaps in liability coverage.