Should the Buick GL8 Business Van Use 92 or 95 Octane Gasoline?

3 Answers
DeHadley
07/23/25 6:09pm
The Buick GL8 Business Van should use 95 octane gasoline. 95 octane gasoline consists of 95% isooctane and 3% n-heptane. The Buick GL8 Business Van is equipped with a 2.0T turbocharged engine, which is suitable for 95 octane gasoline. When the engine has a high compression ratio, high-octane gasoline should be used. If low-octane gasoline is used in a high-compression engine, it can cause abnormal combustion, leading to knocking, increased fuel consumption, and reduced driving power. The Buick GL8 Business Van is a vehicle launched by SAIC-GM, featuring a geometric sculptural design concept combined with a grand and spacious appearance, offering a new interpretation of modern MPV design aesthetics. The Buick GL8 Business Van utilizes the new Buick family-style winged chrome grille and full-LED automatic sensing headlights, creating a distinctive and angular front face with high recognition.
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McGavin
08/10/25 1:48pm
As a veteran driver who has been driving a Buick GL8 for many years, I always insist on using 95-octane gasoline. The GL8, as a business vehicle, has a relatively sophisticated engine, and the manufacturer recommends using high-octane fuel to achieve optimal performance. The 95-octane fuel has a higher octane rating than 92-octane, effectively preventing engine knocking and detonation issues, resulting in smoother starts and more linear acceleration. Although 92-octane fuel is a few cents cheaper per liter, long-term use can lead to increased engine carbon deposits and higher fuel consumption, which is not worth the savings. I have never tried using 92-octane fuel because the manual states that using lower-octane fuel may affect the warranty, and breaking down on the road would cost a fortune in repairs. Especially in northern winters, 95-octane fuel has better fluidity at low temperatures, making the engine easier to start. Choosing the right fuel octane rating is not just about saving money but also a safety consideration. Business vehicles carrying passengers should be even more cautious.
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DominicLee
09/22/25 8:29am
My buddy often drives the company's GL8 for business trips and always says using 92-octane fuel saves money, but I found it unsatisfactory after trying it. Although 95-octane is slightly more expensive, the throttle response is crisper, especially during high-speed overtaking where power delivery is noticeably more stable. Using 92-octane occasionally causes slight engine vibrations and increases the risk of dashboard warning lights. Engines in Buick models like this are designed for higher performance with elevated compression ratios—lower-octane fuel is prone to premature ignition under high temperatures, potentially damaging components. The owner’s manual strongly recommends 95-octane to extend engine life and reduce maintenance frequency. Crunching the numbers, while 92-octane saves money short-term, it increases fuel consumption by about half a liter per 100 km, costing more in the long run. Fuel choice depends on driving habits—occasionally using 92-octane in emergencies for short distances is fine, but making it a habit will degrade driving experience.
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