Why does Volkswagen require 95-octane gasoline?
2 Answers
Volkswagen requires 95-octane gasoline for the following reasons: 1. To allow the engine to enter optimal working condition faster; 2. Higher octane rating helps control engine knocking. Gasoline is a volatile, flammable hydrocarbon mixture liquid obtained through petroleum distillation or cracking processes, used as fuel with relatively high octane ratings. Volkswagen's vehicle models include: Lavida, Magotan, Sagitar, Golf, Bora, etc. Taking Lavida as an example, it belongs to the compact car category with body dimensions of: length 4670mm, width 1806mm, height 1474mm, wheelbase 2688mm, fuel tank capacity 51 liters, and trunk capacity 510 liters.
I've been driving a Volkswagen for three years and always use 95-octane gasoline. Volkswagen's turbocharged engines have a relatively high compression ratio, generally above 10. A higher compression ratio requires gasoline with better anti-knock properties. 95-octane has a higher octane rating than 92-octane, making it less prone to knocking. Knocking occurs when gasoline ignites prematurely in the cylinder, which can cause engine vibration in mild cases or piston damage in severe cases. Additionally, I've noticed that using 95-octane gasoline makes the engine run quieter and improves throttle response. Although it costs a few cents more per liter, the fuel consumption actually decreases by about 3%, so the overall cost is roughly the same. If I were to use 92-octane long-term, the engine warning light would frequently come on, and the cost of a single repair would cover a year's worth of 95-octane fuel.
