rear main seal leaking
Try the throttle position sensor
it might have a sticking thermostat.
My 1990 dodge Dakota sport V6 gets around 450 miles on a tank of gas doing mostly hwy driving.
fuel pump
Dodge Dakota was created in 1986.
The body computer controls the wipers. The transmission computer controls the transmission. The engine computer controls the engine. The wiper issue is probably a failed wiper/turn signal switch. Have the TCM and PCM checked for codes for the other two issues.
The Dodge Dakota was in the Dodge car brand until 2009, and was sold as the RAM Dakota until 2012.
have brakes check
When turning headlights on, pull out on headlight switch knob.
Oxygen censor
most common is wheel bearings