Why is my Audi 80 experiencing loss of power after a few hours of driving?

I have noticed that after driving my Audi 80 for a few hours, it starts to lose power and struggles to accelerate. I've checked the oil levels and they seem fine. Any suggestions on what could be causing this issue?

This sounds like it could be an issue with your fuel filters. As they become clogged over time, they can affect your car's performance. I recommend getting them checked and replaced if necessary. Also, make sure to use high-quality fuel to prevent future clogging.