Does the Buick Regal use 92 or 95 gasoline?

[VanMason]

The Buick Regal 1.5T model uses 92-octane gasoline, while the 2.0T model uses 95-octane gasoline. Only when the octane rating of the gasoline meets the engine's compression ratio requirements can the vehicle's power and fuel efficiency be fully utilized. You can check the car's user manual, which specifies the required fuel grade. Here is some information about gasoline: 1. The gasoline grade represents the octane rating of the fuel. The higher the grade, the higher the octane rating, indicating better anti-knock performance. Better anti-knock performance ensures smoother engine operation, reduces wear, and provides better engine protection. 2. If a high-compression engine uses low-grade gasoline, incomplete combustion may occur, leading to severe engine vibration, reduced power output, engine damage, increased fuel consumption, and poor driving performance. Conversely, if a low-compression engine uses high-grade gasoline, delayed combustion may occur, meaning the fuel does not reach its auto-ignition point at maximum compression, also resulting in incomplete combustion. This requires additional fuel injection to ensure power output, which not only offers no benefit to the engine but also increases fuel consumption.