According to a website I was looking at :
For a 1992 Mercury Grand Marquis , 4.6 liter V8 engine :
( 16 / 17 in the city and 23 / 24 on the highway , miles per U.S. gallon )
Fuel leak? Defective carbon canister?
Auto Zone will check your computer codes for FREE... They will even check your charging system too...
typically the 1992 Mercury Sable can hold up to 16 gallons
windshield from 1992-1997 will fit all
Yes , the 4.6 liter , SOHC , V8 engine in a 1992 Mercury Grand Marquis is fuel injected
The most common is 13726548.
A 1992 Mercury Grand Marquis came from the factory with ( 5W-30 )
normally twelve
Take it to Best Buy
8 spark plugs
Anything's possible (...but why?)
In the front of the engine behind the A/C condensor