[s-cars] mileage with MTM1+

[Konstantine Bogach]

Based on responses (thank you!)  I think I have a problem somewhere.   
18-20 mi/gal on average on RS2 convert is much better then me having  
max. 18.5 with only MTM 1+ chip at mixed driving (I even would not  
call it "city" around Princeton, NJ).   Cruising on highway at ~78 mph  
does not make it better than 21-22 mi/gal.
What should I check?  Ok, I will go over O2 testing again (1 year old  
one).  What else?   Can MAF be failing gradually?
Thanks.
Konstantine

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