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Question:

1995 Ford Explorer gas mileage reduction with thumping. Causes?

I've been taking proper care of this car since i've bought it.I've been keeping track of my mpg since day one, and just recently i noticed a sharp decrease in my mpg.I used to get 300-320 miles to a tank of gas, but now i only get 200-250.I got my oil changed to a high mileage 5000 mile oil, tires rotated and inflated, and all fluids flushed and filters replaced.It also seems to have lost some power.Occasionally, when I coast i get this thumping noise which sounds like i'm hitting small ridges or rope/cable laid across the road. the frequency reduces when the car slows down.What could be causing this? Are the two problems related? I feel the thumping appeared after my oil change. but the mpg reduction and thumping appeared close to each other.Any advice would be appreciated.

Answer:

your car is 14 years old. you conveniently left out the odometer reading of your car and when you bought it. at 14 years old, and with an average annual milage of 12000, you could have 168000 miles on the car by now. or even more. we dont know. with that sort of milage, theres plenty that could start to reduce your fuel economy. transmission, brakes, bearings, the motor just being less efficient. as for the thumping rather vague description. where is the noise coming from. is it only happening when you accelerate. when you turn. when you brake. at all speeds. at certain speeds. only on certain surfaces. if you suspect the oil, shouldnt you have changed the oil again then? did you examine the oil when you last changed it
my ninety 9 Explorer might prevalent 37MPG street and 26 MPG city. My brother's ninety six averages 35 MPG street and 23 MPG city. His wifes 2008 explorer averages 32 MPG street and 20 mpg city. All have the 6 cyl automobiles. The mileage is averaged applying the Imperial Gallon (4.454 Litres in keeping with Imperial gallon) so the adjustments may well be little whilst in comparison with the U. S. Gallon (3.80 4 litres in keeping with US gallon) shop them nicely maintained, use completely guy made oils and tension nicely, no longer agressively, and that they are much low-priced automobiles to run. extra fee-effective than maximum compact automobiles.
it could be the lifters

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