The oil to use in a 2002 Montana depends on the climate. In summer, use a 10-40 wt oil. In the winter, a 10-30 wt or even a 5-30 wt is alright.
5W30
5W30
5w30
5W-30.
A good brand of 5w30
we use 20/50 of any brand you choose.
According to the 2002 Lincoln Navigator Owner Guide : ( 5W-20 engine oil is recommended )
SAE 10w30 hope this helps
5w30 or 10w30
Oil type and weight is on the oil cap. I believe it's 5W30 but check for yourself.
10w3010w30
SAE 5w20 any premium brand.