It would have come from the factory with ( 5W-30 )
blue
According to the manual, the recommended weight is 5w30. I do not know if there is a recommended brand or not.
Down by the oil filter.
The recommended oil is SAE 5W-20
The same weight recommended in the owners manual.The same weight recommended in the owners manual.
No, not if the recommended weight is 5w30. Only use the weight recommended by the manufacture.
According to the 2002 Lincoln Navigator Owner Guide : ( 5W-20 engine oil is recommended )
Up where the oil filter is located.
In the engine.
5w30
5w30 is recommended
You should use 5W30. That is the recommended weight.