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The 2015 Nissan Sentra runs on regular unleaded gasoline with 87 octanes and has a fuel tank capacity of 14.2 gallons. While you have the option to use premium gas with 91 octanes, it's not necessary as it will only cost you more without providing any extra benefit. It's important to never use diesel in this car - if you accidentally put diesel in the tank, do not start the engine and have it towed to a mechanic immediately. Starting the engine with diesel fuel can damage it, leading to costly repairs. Additionally, letting the fuel sit in the tank, even for a short period, can harm the tank and gas line. Opening the gas tank can be done using the button inside the car, the key fob, or by manually pulling it open.
The 2015 Nissan Sentra is designed to run on regular unleaded gasoline.