How can you improve the efficiency of your Audi A2's engine?

I have a 2002 Audi A2 with a 1.4 TDI engine. The fuel consumption has been higher than expected and it doesn't have the same power as when it was first bought. Any tips on how I can improve its efficiency?

First and foremost, make sure your car is properly maintained with regular oil changes and tune-ups. Next, check and clean your air filter and fuel injectors to ensure proper air and fuel flow. Additionally, using a fuel additive and driving at a consistent speed can also help improve efficiency.

Are the tires on your Audi properly inflated? Under-inflated tires can decrease fuel efficiency. Also, try using synthetic oil and installing a cold air intake for better engine performance.

Try reducing the weight of your car by removing any unnecessary items in the trunk or backseat. Switching to lighter weight rims can also improve overall efficiency.