Usually by the passenger side firewall Some are accessible behind the glove box (inside the passenger compartment) Some are accessible at the firewall (outside the passenger compartment)
5w30
i have a 1999 avenger with a 2.5L v6 and i get 25 mpg highway.
This website might be helpful.www.dodgeparts.com/
a 1999 avenger es will top out at 128mph I have brought my 2000 dodge Avenger base to 145.
It's located behind the glovebox, on the passanger side of the dash
three screws accesible under dash on passenger side.
Blower motor: remove the glove box and you will see the blower motor and blower resistor.
the avenger
5w30
5w30
It should be in the heater blower motor case which is located under the glovebox.
It is over the passenger side strut tower, accessible from under the hood.