With diesel and gasoline prices remaining high in Germany—over two euros per liter despite tax breaks and released oil reserves—fuel-efficient cars are increasingly valuable. This report identifies the most efficient internal combustion engine vehicles currently available. Despite the push for electric vehicles, many consumers still rely on gasoline and diesel cars. Finding a vehicle that maximizes fuel economy is therefore crucial for budget-conscious drivers. The article details which models offer the best performance in terms of fuel consumption. This information is particularly relevant given the sustained high costs at the pump throughout Germany. Ultimately, these cars provide a way to mitigate the financial burden of refueling.