178,800 fuel filter change comparison
 

As a comparison with Porche fuel filter change requirements much sooner than Audi. Not that my Audi was having issues, but I decided to change the fuel filter on my Audi @178,800 miles and found that the fuel filter and fuel was not that bad. I expected the fuel to be much darker as well as the fuel filter. I may never need to change the fuel filter on my Audi ever again.

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Wow, that is really surprising - I was expecting it to be black as coal. Are you sure that it wasn't changed recently by a shop or a previous owner?

Congrats, you folks in Denver must have the cleanest fuel in the country. :)

No, I am the first owner of this car. I have done all maintenance myself except for timing chain.