I know I'm late but........I had the same problem after replacing my filter with an autozone replacement. Mine went from about 30mpg to roughly 23-25. I would only get 240 to a tank.
BTW I was wanting to do a z6 or a6 block with me B7 head like you. I like the cr. I'll ask you at a later date how it was.
Back on track. Maybe a year after I changed my filter my dizzy took a crap. My back bumper has black soot right where the N1 exits. I figured bad valve seals. I'll be pulling the head soon to find out.
Pretty much all the advice given were things I've been meaning to look into on mine all year. I hope you get your situation figured out.
BTW I was wanting to do a z6 or a6 block with me B7 head like you. I like the cr. I'll ask you at a later date how it was.
Back on track. Maybe a year after I changed my filter my dizzy took a crap. My back bumper has black soot right where the N1 exits. I figured bad valve seals. I'll be pulling the head soon to find out.
Pretty much all the advice given were things I've been meaning to look into on mine all year. I hope you get your situation figured out.
