Should the Porsche Cayenne use 95 or 98 octane gasoline?

[MalachiDella]

Both 95 and 98 octane gasoline can be used for the Porsche Cayenne. 95 octane gasoline consists of 95% isooctane and 3% n-heptane. When the engine compression ratio is high, gasoline with a higher octane rating should be used. If low octane gasoline is used with a high compression ratio, it can cause abnormal combustion, leading to knocking, increased fuel consumption, and reduced driving performance. 98 octane gasoline is equivalent to a mixture of 98% isooctane and 2% n-heptane in terms of octane rating. The Porsche Cayenne is an SUV model equipped with 265/50R19 Michelin Latitude Sport low rolling resistance tires. The vehicle has a maximum power output of 340 horsepower and a top speed of 266 kilometers per hour.