Should the Touareg use 98 or 95 gasoline?

[MiaRose]

Touareg can use either 98 or 95 gasoline. Introduction to 98 gasoline: 98 gasoline refers to gasoline whose octane rating is equal to a mixture of 98% isooctane and 2% n-heptane. Engines with high compression ratios should use high-octane gasoline. If a high-compression engine uses low-octane gasoline, it may cause abnormal combustion, resulting in knocking, increased fuel consumption, and reduced driving power. Compared to other gasoline grades, 98 gasoline has stronger anti-knock properties and higher calorific value, providing more powerful performance. Introduction to 95 gasoline: 95 gasoline consists of 95% isooctane and 5% n-heptane. Engines with high compression ratios should use high-octane gasoline.