Use a quality 10w30 in summer and 5w30 for winter or cold climates.
5-30
Should take 4.5 liters of oil.
For a 1995 Ford Crown Victoria : ( 5W-30 engine oil )
in the center console. ======================================================= The oil pan is bolted to the bottom of the engine
MerconV
not all diffs have drain plugs, most you have to just take off the rear diff cover to drain the oil for the crown and pinion gear.
You must remove the oil pan to access the oil pump. It is bolted to the bottom of the engine block.
When i take mine to get the oil changed it take 5 1/2 quats to refill it!
5w30
According to the 2001 Ford Crown Victoria Owner Guide : ( 5W-20 , with engine oil filter change 5.0 U.S. quarts )
According to the 2000 Ford Crown Victoria Owner Guide : With engine oil filter change : ( 4.7 litres / 5.0 U.S. quarts of 5W-30 engine oil )
With engine oil filter change , 5.0 quarts ( 4.7 liters )