Well just filled up since the new O2 and lowered and only got 44mpg. Very disappointed with that considering I drive like a grandma. Feels like lean burn kicks in. Has that parachute behind me feeling when I try to accelerate in the proper rpm range. Idk what to do next. It's a 5 mpg gain from my last fill up. Back than It was 30 degrees and had a bad O2. Have gone through everything's maintence wise in the engine. Maybe could be the winter fuel giving that horrible mileage. Only thing I know is that my car needs an alignment since the coilover install.
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