Only when it is leaking.
You should change the oil every 3000 miles in as 1994 Dodge Van.
You should change your oil every 3,000 miles. If you drive your car rough, then you should change it more often.
25000 milee
5000-7500 miles
I recommend every 50,000 miles.
60,000 miles
1995-2000 change it every 60,000 miles.
2000 Dakota w/4.7L calls for 5W-30W...mechanics that have done rebuilds will tell you to continue to change oil often....I do every 3K...now have 175,000 mi
3 month 3000 miles
Every 15,000 miles.
3 month 3000 miles