Most likely 10W-30 would work but it depends on your engine type, some stratus's recommend 5W-30 for the 3.0 . Feel free to use other guides that one may look at in the situation such as your OWNERS MANUAL. Or possibly go to a local auto place and ask.
5w30
It is important to know the cars oil capacity when changing the oil or oil filter. The Engine oil capacity for the 1999 Dodge Stratus 2.4 Dohc is 2.4 liters.
5w30
5w30 or 10w30.
5w30
5w30
5w30
If you don't know, Take it to Jiffy Lube.
4.5 quarts
5w30
5w30 or 10w30
aluminum