Well, it'll run on it. That said, if you want to enjoy all the car has to give you'll want to put in 91 or mix octanes to get close. Some cars tolerate low octane better than others. My 300C requires 89 which I can't get. It pings and scares me with 87 at part throttle. So 91 is what it gets or a mixture of 87 and 93 with ethanol. (I hate ethanol, lower gas mileage and higher AFR's with it) Your car will run on 87 but will most likely knock at anything over gentle throttle applications. Drive it with 87 and then put in 91. Make up your own mind based on the results.

Les