Hello,
The EPA mileage rating is 17 city and 25 highway as you know.
However realistic mileage for these cars are often 14-15 MPG on typical city and 19-22 on highway. But that will also depend on the driving condition, driving style, outside temperature, terrain etc.
So, you are getting the 18 MPG is actually reasonable.
Another thing to keep in mind that those EPA mileage ratings are for new cars in ideal condition.
As the vehicle accumulates miles the internals of an engine and drivetrain will worn, and they will lose some of the efficiency.
From the list of items you mentioned, you have done all the right things and taken the right steps.
Changing the transmission fluid can be done, however it will not improve the fuel mileage.
Please let me know if you have any questions.
Thank you.
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Thursday, January 13th, 2022 AT 12:46 PM
