The fuel economy of the Vauxhall Astra can vary depending on the specific engine type, model year, and driving conditions. However, in general, the Astra is designed to be a fuel-efficient car, particularly when compared to larger vehicles. According to official fuel consumption figures, the most efficient Astra models can achieve up to 60mpg on the combined cycle. It's worth noting that actual fuel economy will depend on driving style, traffic conditions, and other factors, so it's important to look at specific fuel economy figures for the specific model you’re interested in.