Regular gasoline has an octane rating of 87, which is lower than the recommended octane rating for your vehicle. Using regular gasoline in a vehicle that requires premium gasoline can cause engine knocking, pinging, and decreased performance. In severe cases, it can also damage the engine.
If you are unable to obtain premium unleaded gasoline, you can use regular unleaded gasoline with an octane rating of 87, but you should avoid driving at high speeds or under heavy loads. You should also fill the tank with premium unleaded gasoline as soon as possible.