Hello all

I got a 05 grand marquis with 157,000 miles on her she still runs good and strong. My question is it still worth putting mods on it or is the mileage of the car to high?

I did the J-Mod at 57K when I had the car and change the oil every 4K and transmission every 50K.

thanks
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05 grand marquis ultimate edition LS Birch silver 157,295