What type of gasoline should a Bora use?
2 Answers
The Volkswagen Bora should use 92-octane gasoline. The fuel grade suitable for the vehicle is listed on the label inside the fuel tank cover. 92-octane gasoline refers to gasoline with an octane rating of 92, which is suitable for mid-range vehicles (with relatively low compression ratios). Additional information: 1. Gasoline is produced and sold according to its grade, which is specified by national gasoline product standards. Currently, China's National (IV) gasoline grades include three types: 90, 93, and 97. National (V) grades are 89, 92, and 95 (with 98 available in the appendix). 2. Gasoline grades are classified by octane rating. The higher the grade, the better the anti-knock performance. Different gasoline grades should be selected based on the engine's compression ratio, as specified in each vehicle's manual. Mid-range cars with a compression ratio between 8.5 and 9.5 should generally use 90-octane (National IV) gasoline, while cars with a compression ratio above 9.5 should use 93-octane (National IV) gasoline. 3. If a high-compression engine uses low-grade gasoline, it can cause a sharp rise in cylinder temperature, incomplete combustion, severe engine vibration, reduced power output, damage to components, increased fuel consumption, and poor driving performance. Conversely, if a low-compression engine uses high-grade gasoline, it may lead to "delayed ignition," where the fuel does not reach its auto-ignition point at maximum compression, resulting in incomplete combustion, which is also harmful to the engine.
My Volkswagen Bora has been running for almost seven years, and I've always filled it with 95-octane gasoline. When I picked up the car, the salesperson mentioned that its engine has a high compression ratio, and using higher-octane fuel helps prevent knocking. Now, when I step on the accelerator, the acceleration is incredibly smooth, and overtaking on the highway feels effortless. Although 95-octane costs a few cents more per liter than 92-octane, the cost per kilometer works out to be about the same. Plus, carbon buildup is noticeably less compared to my friend's car, which uses 92-octane. Once during a road trip in the mountains, the only fuel available was 92-octane. After filling up, the engine noise became noticeably louder, and the RPMs were unstable. I switched back to 95-octane as soon as I returned to the city. My advice to Bora owners: if the fuel cap indicates 95-octane, stick with it—don’t risk damaging the engine to save a few bucks.
