Should the Envision use 92 or 95 octane gasoline?
2 Answers
Buick officially recommends using 92 octane gasoline for the 1.5T engine and 95 octane gasoline for the 2.0T engine in the Envision, based on the engine displacement. The differences and usage scenarios between 92 and 95 octane gasoline are as follows: Differences between 92 and 95: The main difference between 92 and 95 octane gasoline is the significant variation in anti-knock properties. 95 octane gasoline offers better anti-knock performance, preventing engine knocking. Usage scenarios for 92 and 95: Using 95 octane gasoline provides better power performance and lower fuel consumption, making it suitable for highway driving. However, if frequently driving in congested urban areas, the gasoline may not burn completely, leading to increased carbon deposits, which can easily result in reduced engine power and higher fuel consumption. Therefore, if you primarily drive in the city, it is advisable to use 92 octane gasoline.
A veteran Envision driver with over a decade of experience tells you, the official manual clearly states 95-octane fuel is recommended. My 2.0T has been running exclusively on 95 since day one, and now at 120,000 km the engine still feels brand new. Using 92 occasionally in emergencies is fine, but long-term use really damages the car, especially with higher knock risk in turbocharged engines. Last week I checked my neighbor's Envision - its valve chamber had coal-mine-level carbon buildup from prolonged 92 use, costing over 4,000 RMB to repair. Those extra few cents for 95 actually give you more mileage, making the per-kilometer cost lower in the long run.
