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Model Year Body/Powertrain MPG  
2016 2016 4dr Sedan 201-hp 2.4L I4 8-sp automated manual FWD 38.89
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With the 201-horsepower 2.4L I4 engine, 8-speed automated manual transmission, and front-wheel drive, the 2016 Acura ILX has been averaging 38.89 MPG (miles per gallon).

The 2016 Acura ILXs in this analysis were driven mostly on the highway at an average speed of 60 miles per hour (about 90 percent of the miles driven). The rest of the miles were in the suburbs (0 percent), in the city (0 percent), and in heavy traffic (0 percent).

In addition, the average 2016 Acura ILX in this analysis was driven on hilly terrain with a medium foot and the AC on only some of the time.
2013 2013 4dr Sedan 201-hp 2.4L I4 8-sp automated manual FWD 40.8
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TrueDelta Reviews the Real Gas Mileage of the Acura ILX

Acura ILX Real Gas Mileage: Pros
2016 High-revving largish fours aren't the fashionable route to fuel efficiency. But the 201-horsepower 2.4-liter engine when mated to an eight-speed dual clutch automated manual transmission (DCT) returns EPA ratings of 25 mpg city, 36 mpg highway--better than the 2013-2015 ILX managed with a 150-horsepower 2.0-liter engine. The Audi with its au courant 180-horsepower turbocharged 1.8-liter checks in a little lower, with 23/33. But the Acura isn't quite best-in-class. The Mercedes-Benz CLA250 manages 26/38. Notably, both the Audi and the Mercedes also have DCTs, though with "only" six and seven speeds, respectively. Then there are hybrids and diesels. The ILX used to be available as a hybrid. But the ILX Hybrid's fuel economy wasn't stellar (39/38) and its performance was so uncompetitive even compared to the Prius-based Lexus CT 200h (43/40) that Acura killed it after just two model years. The Audi A3 TDI, the segment's lone entrant with a diesel, rates 31/43. For a combination of performance and fuel economy, it's hard to beat. Except that as I write this Audi dealers can't sell them, pending an investigation into whether they violate EPA regulations. A final note on fuel economy: the TLX's EPA figures are only a single mpg lower than the ILX's. see full Acura ILX review
Acura ILX Real Gas Mileage: Cons
Why doesn't Acura offer the larger four-cylinder engine with an automatic transmission? Likely because its fuel economy is already iffy with the stick. The EPA ratings are 22 MPG city, 31 highway. One benefit of turbochargers is that they enable lower rpm shifts and taller gearing. A Jetta GLI matches the Acura in the city, and does a couple MPG better on the highway. Not bad, but you'll find some much more powerful, much larger cars that score better than either of them. see full Acura ILX review

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Acura ILX Gas Mileage (MPG)

Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the Acura ILX's real-world MPG based on how and where you drive a car.