I recently purchased a 2015 mustang ecoboost 50th anniversary edition with 110000 miles, but I have been getting poor fuel economy (17.0mpg). I drive mostly highway with minimal city and I drive conservatively. The previous owner has the car tuned on 93 with a Cobb access port and a tune + pro tune by Adam including the transmission tune. One thing the owner mentioned is that it may be due for plugs the next oil change and the pinion bearing may need to be changed in the future (makes some noise while lightly accelerating) the car also has an upgraded inter cooler and waste gate. Is the tune the reason for my poor fuel economy? I have the original parts and can revert to the factory tune if my fuel economy will be improved. Thanks in advance.
MeanTangerine15
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Ask the previous owner if the wastegate is a 7 pound, or something higher. If it's 7# you can go all the way back to a stock tune. If it's the Tune+ custom wastegate, you'll either need the stock wastegate actuator, or one with a lower spring rate in order to go to any other tune.
You may be best served by paying for a tuning by Tune+ and asking for a tune with better gas mileage as the one it's on now isn't working for you.
And as always, a light right foot is the key to good mileage. I have a predominately highway drive to work as well, and can see low 30's for MPG on my drive back and forth. I also almost always use cruise control once I get on the highway and that helps a lot. Mine gets bad in daily around town on my days off, but I still average 21 MPG since new...
You may be best served by paying for a tuning by Tune+ and asking for a tune with better gas mileage as the one it's on now isn't working for you.
And as always, a light right foot is the key to good mileage. I have a predominately highway drive to work as well, and can see low 30's for MPG on my drive back and forth. I also almost always use cruise control once I get on the highway and that helps a lot. Mine gets bad in daily around town on my days off, but I still average 21 MPG since new...
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If I were in your shoes, I would normal things up with the stock wastegate, the stock tune and 93 octane.
Yes, you CAN run 87, but I wouldn't, especially when trying to troubleshoot for gas mileage.
Of course the only tank full of 87 octane my car has ever had was what came in it from the dealer. It's seen only 93 octane since November of '16. I would never run a turbo car on anything less than 93.
Yes, you CAN run 87, but I wouldn't, especially when trying to troubleshoot for gas mileage.
Of course the only tank full of 87 octane my car has ever had was what came in it from the dealer. It's seen only 93 octane since November of '16. I would never run a turbo car on anything less than 93.
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No, the Cobb tuner has a "Level 0" stored in it which is the original stock settings leaving the Cobb married to the car.
And yes, you'd be able to re-load the custom tune, but... The custom tune is set up with that Wastegate and the WGA table would be incorrect with the stock one in place. That's why you'd need to remove the wastegate actuator and flash back at the same time.
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