What is the 2019 honda civic si fuel type?

It is recommended to use unleaded premium gasoline envy 2019 Honda Civic Si with an octane of 91 or higher. Using a lower grade can eventually cause a heavy metallic knocking noise, and potentially damage the engine. Whenever possible, use of gasoline that is labeled TOP TIER Detergent Gasoline. These fuels are designed without metallic additives and contain the proper detergents. The detergent additives help prevent deposits in the fuel system, engine and emission control system. When fueling the car turn off the engine and unlock the drivers door using the master door lock switch, this will also unlock the fuel door. Push in on the right side of the fuel door to unlatch it. The fuel filler opening is designed to only accept gas station nozzles. Inserting something smaller than that could damage the filler opening.