I might of asked this already and if I did I'm sorry but I can't remember. I have a 1999 Dodge caravan SE with a 3.3 liter engine (not flex fuel) Does anyone know the oil reccomened in the owners manual? Is it 5w30 or 10w30? I was going to go with 5w30 mobil 1 is that ok? Someone told me the reccomened for a 1999 3.3 is 10w30. The van sees temperature extremes -40 Celsius in winter and +40 Celcius in summer. No towing or other heavy use.