My 2004 Mercury Grand Marquis is one of the most trouble-free cars I've ever owned, but the 4.6 V-8 is a notoriously loud running engine and at 30,000 miles, it developed a minor high speed miss. I tried a few bottl...
My 2004 Mercury Grand Marquis is one of the most trouble-free cars I've ever owned, but the 4.6 V-8 is a notoriously loud running engine and at 30,000 miles, it developed a minor high speed miss. I tried a few bottl...