Our 2004 Explorer 4.6L has suddenly lost 2mpg, from 16.4 mpg average to 14.4 mpg. anyone had this problem, or can offer advise?

Thanks

Walt

 

There are several possible reasons for mileages to change among which could be gasoline formulation,tire air pressure, outside temp,terrain traveled, different drivers etc. Routine maintenance also enters the picture, do any of these apply to your situation?

 

hanky,
same gas station always used (vehicle stays in town), tires are new and pressures as spec., cooler temps lately but this drop in FE has been consistent over last 6 tanks of gas, only one driver, and all scheduled maintenance has been performed on or before time due. It has been a great vehicle, still is, but something is not right with the way it is using gas now.

 

When were the spark plugs last changed ? Who did it?
Are you using 4WD more than usual? In what part of the country do you reside ?
Is the vehicle going fast enough to get into overdrive?
Can you smell anything that might resemble a gasoline odor?
There could be other reasons for a drop in mileage that might require a mech/tech to look into it further with the right equip.