What Grade of Gasoline Should the Tayron Use?
2 Answers
The Tayron should use 95-octane gasoline, as this is the recommended grade specified in the vehicle's official user manual. In addition to checking the appropriate gasoline grade in the user manual, you can also find this information on the fuel tank cap, which will indicate the recommended grade. Typically, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with a 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. If the compression ratio is higher, 98-octane gasoline is recommended. However, with the adoption of new technologies, the compression ratio alone cannot determine the appropriate gasoline grade. High-compression engines can also be tuned to use lower-octane gasoline, as factors like ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline grade, the higher the octane rating 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 Tayron occasionally uses the wrong gasoline grade, simply switch back to the correct grade after refueling. However, prolonged use of the wrong grade can have the following effects: For vehicles designed for lower-octane gasoline, using a higher grade will not cause damage, but the increased octane rating can alter the fuel's ignition point, leading to delayed combustion. This reduces the engine's power output and thermal efficiency, resulting in poorer performance. For vehicles designed for higher-octane gasoline, using a lower grade can cause engine knocking. The significantly lower octane rating lowers the fuel's ignition point, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires, resistance is created during the upward stroke. This resistance makes the engine run very unevenly. Mild knocking may only increase noise without noticeable engine damage, but severe knocking indicates serious engine issues, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, potentially leading to cylinder scoring.
I've been driving the Tayron for almost three years, and there's a lot to consider when it comes to refueling. The fuel cap recommends using 95-octane gasoline, as the car has a turbocharged engine with a high compression ratio, and 95-octane fuel provides better anti-knock performance. While it can run on 92-octane fuel, prolonged use of lower-grade gasoline can lead to carbon buildup, and the engine may produce knocking sounds. During a recent self-drive trip to Inner Mongolia, the gas station only had 92-octane fuel, so I had to fill half a tank in an emergency. I immediately noticed the lack of power when stepping on the accelerator. During routine maintenance, the 4S shop technicians always remind me to refuel at reputable gas stations and avoid cheaper fuel from small, unreliable vendors, as a clogged fuel filter can cause bigger problems.
