Should the BX7 use 92 or 95 octane gasoline?

[MacSienna]

BX7 should use 95 octane gasoline and must not use 92 octane gasoline. The selection criteria for gasoline grades and the differences between 92 and 95 octane gasoline are as follows: Selection criteria for gasoline grades: The engine's compression ratio is the sole standard for selecting gasoline grades. Generally, engines with a compression ratio of 10:1 or higher should use 95 octane gasoline or higher. Owners can refer to the manual or the label on the fuel tank cap to choose the appropriate gasoline. Differences between 92 and 95 octane gasoline: The difference between 92 and 95 octane gasoline is not about quality but the different content of isooctane added, which affects the gasoline's anti-knock properties. 95 octane gasoline has a higher isooctane content, making it slightly more expensive and providing better anti-knock performance.

[VonFrancisco]

I've been driving the Borgward BX7 for several years and found this quite important. The manual recommends using 95-octane fuel, but I tried 92-octane once. It was cheaper, but the engine tended to shake when it got hot, especially during long-distance driving with sluggish acceleration and louder noise. After switching back to 95-octane, the performance became much smoother with stable acceleration, and it even saved some maintenance costs in the long run—less wear on spark plugs and fuel injectors. If you're on a tight budget, occasionally using 92-octane in emergencies is fine, but never mix them long-term, as it accelerates engine carbon buildup, leading to higher repair costs later. Ultimately, following the manufacturer's recommendation is the safest bet—proper maintenance ensures longevity.

[Debra]

As a car owner with some knowledge, the engine design of the Borgward BX7 is based on the high octane rating of 95-octane gasoline. Using 92-octane fuel with a lower octane rating can easily cause knocking, which means unstable combustion inside the engine, leading to reduced power and increased noise. 95-octane fuel optimizes combustion efficiency and protects the turbo system, performing more reliably in city traffic jams or on highways. Although the price difference per liter is just a few cents, in the long run, it saves fuel and reduces part wear, offering better cost performance. I recommend adding a bottle of fuel additive regularly to clean carbon deposits, combined with maintenance checks on the fuel system. Don’t risk major repairs to save a little money.

[RowanRose]

For those mindful of their budget, let's talk about the noticeable differences between 92 and 95 octane gasoline in the BX7. While 92 octane is slightly cheaper, it results in higher fuel consumption, louder engine noise, and reduced power. Crunching the numbers, 95 octane proves more economical in the long run as it extends engine life and saves on repair costs. The manual specifies 95 octane as mandatory—don't take risks. Using 92 octane occasionally in emergencies is acceptable, but prolonged use may accelerate wear and void the warranty. Stay alert for engine vibrations as a signal to switch back to 95 immediately. Smart car maintenance requires careful calculation.

[EthanRose]

Car Maintenance Tips: The BX7 definitely requires 95-octane fuel to avoid knocking risks, otherwise engine damage will cost a fortune to repair. In hot weather or under full load, 95-octane ensures stable performance and protects the fuel injectors. The manual is the golden reference—don't cut corners blindly. Regularly check spark plug color to determine if the fuel is suitable. Gentle driving habits can also extend engine life—don't blindly switch to lower-octane fuel to save money. Safety first—treasure your car like an old friend.