How can I troubleshoot high fuel consumption in the Audi 80?

I have noticed that my Audi 80 is using more fuel than usual. I have tried changing the air filter and spark plugs, but the issue persists. What else can I do to reduce my fuel consumption?

I recommend checking your tire pressure regularly, as under-inflated tires can significantly increase fuel consumption. Also, consider using fuel additives to clean out any deposits in your engine.

In addition to regular maintenance, such as oil changes and tune-ups, you may want to have a mechanic check your oxygen sensor. Faulty sensors can cause your engine to run too rich, leading to higher fuel consumption.

Have you tried changing your driving habits? Avoiding unnecessary idling, using cruise control, and accelerating slowly can all help improve fuel efficiency in your Audi 80.