dbtong

I was told it wasn't necessary and could be changed every other time. I change my oil every 3000 miles.

ShaneM

This isn't A4-specific, so I think I can answer.

If you leave the filter on, all the crud that it filtered out of your old oil is still in there, so it's flow rate and ability to filter out more crud is diminished. In short, given the low cost/effort that goes into changing the filter as well, I'd change both every 3000-4000 miles.

Damon (Jeepin 4 now)

also be sure to change your underwear every time you shower. It's kinds like the same thing. ;-)