Can the Passat use 92 octane gasoline?
2 Answers
Passat cannot use 92 octane gasoline and requires 95 octane gasoline. 95 octane gasoline is composed of 95% isooctane and 5% n-heptane. High-compression engines should use high-octane gasoline. If low-octane gasoline is used in a high-compression engine, it may cause abnormal combustion, resulting in knocking, increased fuel consumption, and reduced driving power. Taking the Passat 2021 280TSI Business Edition as an example: The manufacturer of this car is SAIC Volkswagen, classified as a mid-size car, with a gasoline energy type, a 4-door 5-seater sedan body type, a top speed of 210 km/h, turbocharged intake form, and front-wheel drive.
My opinion is that the Passat should not use 92-octane gasoline, as Volkswagen designed this car's engine with a relatively high compression ratio, typically recommending 95-octane or higher gasoline to ensure stable combustion. 92-octane gasoline has a lower octane rating, which can easily cause knocking under high compression conditions—meaning the fuel ignites prematurely, potentially damaging internal engine components like pistons or valves. I suggest checking the owner's manual, which clearly states the recommended fuel grade. Using 92-octane occasionally might not cause immediate issues, but long-term use can lead to increased carbon deposits, higher fuel consumption, and ultimately more expensive repairs. It's better to spend a bit more on 95-octane fuel to protect the engine and reduce the risk of malfunctions, which saves money in the long run. Driving safety comes first—don't risk major problems for minor savings.
