I would check the oil pressure sensor to see if it might have gotten disconnected some how. Might want to check the viscosity rating of the oil that was used. Some cars are really picky about the weight of oil. take it back to the dealership if they were the ones who did it last. Let them know of the problem asap and make sure you let them know that they were the last ones to touch the car.
can be oil pressure change the oil filter
how do you change the light on the gear shift of a 2003 Lincoln navigator
With engine oil filter change ( 7.0 quarts ) according to the 2011 Lincoln Navigator Owner Guide
According to the 2004 Lincoln Navigator Owner Guide : With engine oil filter change ( 7.0 quarts )
According to the 2008 Lincoln Navigator Owner Guide : With engine oil filter change : ( 7.0 quarts of engine oil )
The 2006 Lincoln Navigator owners manual shows : 7 quarts WITH FILTER CHANGE for your 5.4 L 3V engine
According to the 1998 Lincoln Navigator Owner Guide : ( 5W-30 , 6.0 U.S. quarts with engine oil filter change )
According to the 1998 Lincoln Navigator Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts )
According to the 2000 Lincoln Navigator Owner Guide ( 5W-30 ) * with engine oil filter change , 5.7 litres / 6.0 U.S. quarts of 5W-30 engine oil
According to the 1998 Lincoln Navigator Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts of 5W-30 )
According to the 1998 Lincoln Navigator Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts ) of 5W-30 engine oil
A 2000 Lincoln Navigator needs 6 quarts of oil, and the recommended viscosity is 5W20. ========================================================= The 2000 Lincoln Navigator Owner Guide shows to use ( 5W-30 ) The 6.0 U.S. quarts with engine oil filter change is correct