Can the 2021 Tayron use 95-octane gasoline?
2 Answers
According to the official vehicle manual recommendation, the 2021 Tayron should use 95-octane gasoline. In addition to checking the appropriate gasoline grade in the vehicle manual, the 2021 Tayron can also refer to the label on the fuel tank cap. Typically, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92-octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95-octane gasoline. However, with the application of new technologies, the gasoline grade cannot be solely determined by the compression ratio. High-compression engines can also be tuned to use lower-octane gasoline because, in addition to the compression ratio, other factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline octane number, the higher the octane value and the better the anti-knock performance. 92-octane gasoline contains 92% isooctane and 8% n-heptane, while 95-octane gasoline contains 95% isooctane and 5% n-heptane. If the 2021 Tayron occasionally uses the wrong gasoline grade, simply switch back to the correct grade after consumption. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower-octane gasoline, using higher-octane gasoline will not cause damage, but the increase in octane value will alter the fuel's ignition point, leading to delayed combustion in the engine. This results in reduced engine power output and thermal efficiency, with the actual feedback being poorer performance. For vehicles recommended to use higher-octane gasoline, using lower-octane gasoline can cause engine knocking. Due to the significantly lower octane value, the gasoline's ignition point decreases, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires during the compression stroke, resistance will arise during the upward stroke. This resistance makes the engine run very unstably. If the knocking is imperceptible, it only increases noise without obvious damage to the engine. However, if noticeable knocking occurs, it indicates severe engine operating conditions. The vibrations not only affect driving stability but also cause abnormal wear on pistons and cylinders, potentially leading to cylinder scoring in severe cases.
I drive a 2021 Tiguan and always fill it with 95-octane gasoline, which works perfectly fine. The engine in this Volkswagen SUV is turbocharged, and the manufacturer recommends using 95-octane or higher fuel. With it, the throttle response is more sensitive, acceleration is smoother, and I haven't noticed any abnormal noises or vibrations. Occasionally using 92-octane is acceptable, but the manual warns that prolonged use of lower-octane fuel may cause knocking, shorten engine life, and affect fuel efficiency. I've done the math—while 95-octane is slightly more expensive per liter, each tank allows me to drive dozens of kilometers farther, so it doesn't actually cost more and is more worry-free. During maintenance, the mechanic also reminded me that consistently using high-quality fuel helps prevent carbon buildup, protecting the car in the long run. In short, for performance and durability, I always choose 95-octane.
