What Octane Gasoline Should the Buick Envision Use?

[MacBrady]

The Buick Envision should use 92-octane gasoline, as recommended in the vehicle's official owner's manual. In addition to checking the owner's manual for the appropriate gasoline octane rating, you can also find this information on the fuel filler cap. Typically, the gasoline octane can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92-octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95-octane gasoline. If the compression ratio is even higher, 98-octane gasoline is recommended. However, with the use of new technologies, the compression ratio alone cannot determine the appropriate gasoline octane. Engines with high compression ratios can also be tuned to use lower-octane gasoline due to other influencing factors such as ignition timing, turbocharging technology, and Atkinson cycle technology. Generally, the higher the gasoline octane rating, the higher the octane number and the better the anti-knock performance. 92-octane gasoline contains 92% isooctane and 8% n-heptane, while 95-octane gasoline contains 95% isooctane and 5% n-heptane. If the Buick Envision occasionally uses the wrong gasoline octane, simply switch back to the correct octane after the tank is empty. However, prolonged use of the wrong octane can have the following effects: For vehicles designed for lower-octane gasoline, using higher-octane gasoline will not cause damage, but the increased octane number can alter the fuel's ignition point, leading to delayed combustion in the engine. This reduces the engine's power output and thermal efficiency, resulting in poorer performance. For vehicles designed for higher-octane gasoline, using lower-octane gasoline can cause engine knocking. The significantly lower octane number lowers the fuel's ignition point, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires, resistance is created during the upward stroke. This resistance makes the engine run very unstably. Mild knocking may only increase noise without obvious engine damage, but noticeable knocking indicates severe engine conditions. The vibrations not only affect driving stability but can also cause abnormal wear on the pistons and cylinders, potentially leading to severe engine damage such as cylinder scoring.

[FaithAnn]

I've been driving my Buick Envision for three years now, always filling it up with 92 octane unleaded gasoline. The manual clearly recommends 92 octane, and the power output has been consistently smooth. Using higher octane fuel like 95 is just a waste of money—there's no noticeable performance improvement, and it's not cost-effective. Just remember not to use lower octane fuel, as it can cause engine knocking, which affects driving experience and damages the car. During routine maintenance, I also make a habit of checking fuel quality to ensure the gas station isn’t selling diluted or contaminated fuel. This small habit has saved me a lot on repair costs, especially when I check and fill up before long trips—the car runs as steady as new. Overall, following the manual is the safest and most hassle-free approach.

[Talia]

My Buick Envision has always been fueled with 92-octane gasoline, which is crucial because using the wrong fuel grade can lead to safety issues. Lower-octane fuel may cause engine knocking, compromise vehicle stability control, and increase accident risks during high-speed driving or cornering. Personally, I prioritize vehicle health and recommend owners develop the habit of checking the manual—92-octane is the minimum requirement. Using substandard fuel might cause engine overheating and damage. I also remind everyone to schedule regular professional maintenance, where technicians can verify fuel suitability. Don’t cut corners by refueling at cheap gas stations. With the right fuel, even the engine sound feels smoother.

[McBriella]

I use 92-octane gasoline when driving my Buick Envision. The manual recommends this octane rating, which is sufficient. There's no need to use 95-octane unless it's a special edition. Using lower-octane fuel may cause engine problems, which can be expensive to repair. To keep it simple, always check the user manual or confirm with the gas station attendant before refueling. Also, be cautious and avoid filling up at unknown gas stations.