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I purchased a 2014 Mustang GT Convertible, 6 speed manual transmission, 5.0 in October of last year. I have since then put about 11k miles on it and gotten the oil changed every 5k as recommended by ford. When I first got this car and up until about a month ago I had been getting 330+ miles per tank and 22-28mpg. Out of nowhere the mpg dropped to about 12mpg and about 220 miles per tank. Is this normal? I've tried resetting the gauge after filling up a few times and it hasn't changed. Is there anything I should do to it? I've only had the car six months and driven 11k miles total.
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12 mpg sounds really low especially if your driving style hasn't changed. When I first got mine I was babying it, Now I've been driving pretty agressively, but still average about 21 mpg on a tank. Try a long stretch of highway at 70mph to see if you're up in the mid 20s. And you don't need to change the oil every 5k, they have an intelligent oil life monitor that calculates when you need to change it based on the conditions and driving style. I got 8700 miles out the factory oil. In general though, when you see a huge drop in fuel economy, it's a bad MAF or 02 sensor. So if the problem persists and no type of driving changes lead to an increase in mpg, you should have the dealer look at it.
My first tank since buying my car just a week ago was around 12mpg and 220 miles on tha tank as well. Of course, I drive me car hard, did almost all city type driving, and it had 87 octane in it. This time I put 93 in it, and have been driving it much nicer, so will see how it goes.
There are so many things that factor in to your mpg, it can be hard to pinpoint. Quality of fuel, octane, slight change in driving conditions or habits, faulty emissions equipment, how many passengers you have (weight)....
I'll try driving on the highway and see. Up here I do a lot of driving on post which is 35 mph tops and a lot of slowing down/stopping. Luckily it will be nice this weekend so I'll take her for a spin. Thanks for the feedback. If it is anything with the car, it will be covered under warranty.
Thank you everyone for the help. I didn't realize that I could reset the mpg; That it would continuously update on it's own. I filled it up and reset it as I hit the highway avg 65-70mph and it was reading at 25-28mpg then dropped lower once I began driving on base. The only thing I'm not sure about is the guage that displays the total miles for the tank. Will that begin to increase as well since I have reset the mpg or will it just remain at the 230 something mark?
theres a couple MPG screens you can use if you have that smaller TFT screen in between the guages. Its the second option cant remember the exact name for it, but it shows MPG, time on that tank, how many gallons used, and something else. hit the RIGHT arrow and it gives you the same screen so if you're going on a long trip and want to know the info from the WHOLE trip you can use one screen and still reset everything after each fill up on the other screen.
hit the DOWN arrow and it shows the graph of your MPG while you can also reset to start the calculations all over
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