Question about 2003 Mercury Grand Marquis

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My 2003 mercury grand marquis has what I describe as lifter chatter for about the first three seconds after starting. Should I move up in oil weight? or take to shop?

Only does this when first starting in morning. Warm days and more so cold days if sits like eight hours or so.

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This is normal for vehicle this age we own a 04 grand marquis and have had three other vehicles with 4.6 engine and all of them do this with mileage and age i would recommend a good brand name oil and oil change every three thousand mi only thing that may help some is an oil additive called moa that is made by bg also run a motorcraft oil filter FL 820s

Posted on Jan 12, 2013


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How to adjust rocker arm on a 1997 Mercury Grand Marquis

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I have a 2002 grand marquis with 65000 mi when the car sits ove night when i start it in the mornig it make a tapping sound for the first 4 seconds what could it be?

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What you can try are 2 things, both at a Ford or Mercury Dealer. They have "Lube Express" service where they can can install a Ford filter and oil. When you go, tell them you want a Desludge treatment before the oil change. It only takes a few minutes more.

You may have to repeat the Desludge treatment 1 more time before you can eliminate sludge as a problem. See if there is a difference the first time.

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There are instructions in the owners manual. These are for when you get the final "Oil Chanmge Required" message:
To reset the oil monitoring system to 100% after each oil change
(approximately 7,500 miles [12,000 km] or six months) perform the
1. Press and hold the RESET
control for two seconds and release.
Oil life is set to 100% and “OIL LIFE
is displayed.
2. Press and hold the RESET
control for three seconds and
release. Oil life is set to 100% and
XXX%” is displayed.

If you don't have the manual, you can download it at

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