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Hi all!!<br> I have a '78 W123 250. The manual indicates this baby should get about 22mpg (that's Imperial gallons for all you US lookers!!). I am getting 17 at BEST around town. Can anybody give me some clues?? I understand the carb is not adjustable for mixture, only the idle mixture. What next?<br> <br> Thanks<br> <br> Oliver<br>
 
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