@passengerprincessnsx: Part 9-Car Things 101: Gas Types 1. What do the numbers mean? It’s the octane rating of the gas to determine the fuel’s resistance to knocking or pinging. Which is a sign of it compressing too early 2. Why are the grades important? Each engine will specify what grade octane is required to maximize the performance and longevity of the engine. 3. Do you know where to find what your car takes? If you look in the manual or fuel tank door it will often tell you where it is at. Bonus question- what side is your gas tank on? It can be found on the gauge cluster on modern cars. #carthings #gas #fuel #beginners #carfacts