Every 6000 miles.
i have a 1999 avenger with a 2.5L v6 and i get 25 mpg highway.
1995-2000 change it every 60,000 miles.
60,000 miles except in Ca, Mass, & Ct. where it should be changed every 100,000 miles.
The EPA range estimate for the 2014 Dodge Avenger is 354.9 mi. in the city, 490.1 mi. on the highway.
The EPA range estimate for the 2012 Dodge Avenger is 354.9 mi. in the city, 507.0 mi. on the highway.
The EPA range estimate for the 2009 Dodge Avenger is 354.9 mi. in the city, 507.0 mi. on the highway.
The EPA range estimate for the 2011 Dodge Avenger is 338.0 mi. in the city, 523.9 mi. on the highway.
The EPA range estimate for the 2008 Dodge Avenger is 354.9 mi. in the city, 507.0 mi. on the highway.
The EPA range estimate for the 2013 Dodge Avenger is 354.9 mi. in the city, 490.1 mi. on the highway.
The EPA range estimate for the 2010 Dodge Avenger is 354.9 mi. in the city, 507.0 mi. on the highway.
I would recommend looking in your users manual under where it lists the services. It should say at such miles you should change the oil filter, oil, and timing belt.
average 28 on the highway..20 in the city.most will get 25 on the highway