Fuel Mileage Drop since Installing 225s on Cutlass Supreme

[chevelle3504speed]

Thanks again for the great feedback on this.  I have noticed that my trip odometer and conventional odometer record mileage at different rates.  Based on mile-markers, the trip odometer records mileage more slowly (off by about 1/20 of a mile by my rough estimate).  I am now tracking mileage on the conventional odometer, so we'll see how that affects mpg calculations.  May even get the PCM programmed to correct this issue.  On another note, I just purchased a set of factory16 inch 5-spoke wheels yesterday which are in good shape but need painting.  Any recommendations about matching the factory paint?