The Peugeot 3008 Hybrid 4, a diesel hybrid electric vehicle, was studied to see how it performs in terms of fuel consumption in different driving styles and weather conditions. The goal was to find ways to reduce fuel usage and greenhouse gas emissions in cars. The researchers found that combining diesel engines with hybrid technology can make vehicles more fuel-efficient. They tested the vehicle in various driving situations and temperatures, from hot to cold, to see how it affected fuel consumption. The results showed that this hybrid vehicle can operate efficiently across different conditions, helping to save fuel and reduce emissions.