What grade of gasoline should the new Regal 1.5T use?

[OHayden]

For the new Regal 1.5T, using 92 octane gasoline is sufficient. Prolonged use of 95 octane may lead to carbon deposits, so it's essential to follow the vehicle's recommended fuel grade. Definition of 95 octane gasoline: 95 octane gasoline consists of 95% isooctane and 5% n-heptane. Even high-compression engines can use lower octane gasoline; the choice of gasoline grade should not be based solely on compression ratio but should adhere to the manufacturer's recommendations. Differences between 95 and 92 octane gasoline: The primary difference lies in the octane rating, with no other fundamental distinctions. 95 octane gasoline is composed of 5% n-heptane and 95% isooctane, while 92 octane gasoline consists of 8% n-heptane and 92% isooctane. 95 octane gasoline has a higher octane rating than 92 octane, making it more stable and easier to burn, thus delivering greater power output compared to 92 octane gasoline.