Question about Mercury Grand Marquis
COULD BE WRONG OIL VISCOSITY.OIL COULD NEED CHANGING.COULD HAVE ENGINE DETONATION DUE TO WRONG OCTANE GAS.IF ALL LOOKS GOOD TAKE VECHICLE BACK TO DEALERSHIP NEW ENGINE HAS WARRANTY YOU ARE COVERED.
Posted on Nov 12, 2010
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Posted on Jan 02, 2017
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