Shell is renowned for providing high quality petrol and focuses on product quality over affordability. They target upper-class customers who own expensive, performance cars. Their petrol is endorsed by Ferrari and has a superior image. While more expensive, Shell claims their petrol allows performance cars to perform better. In contrast, Tesco focuses on affordable petrol prices to attract a wide customer base. They target existing supermarket customers and others simply looking for cheap petrol. While adequate for most cars, some argue Tesco petrol could damage engines in performance vehicles.