29 MPG combined is a perfectly acceptable figure for the 2018 Acura ILX 2.4L. It aligns with its mission as an affordable entry-level luxury sedan that prioritizes a fun driving experience over outright fuel sipping. This isn’t a hybrid or a hyper-efficient commuter; it’s a gateway to the Acura brand, offering a taste of premium at a reasonable price. Buyers are typically younger professionals or empty-nesters who appreciate a well-appointed interior, responsive handling, and the Acura badge. They’re willing to concede a few MPG to get it. They’re not cross-shopping Prius. They’re looking for something engaging, stylish, and relatively economical to own, and the ILX, even with its fuel consumption, delivers on that promise.

City and highway performance

The official EPA ratings break down to 25 MPG in the city and 35 MPG on the highway. The city figure reflects the realities of stop-and-go traffic, where the ILX’s conventional automatic transmission a smooth and responsive 8-speed unit (AM-S8) will inevitably consume more fuel than consistent highway cruising. The highway number, however, is quite respectable and achievable. Acura’s engineers have clearly optimized the engine and transmission for efficient high-speed travel, likely focusing on maintaining optimal engine speed and minimizing unnecessary downshifts at typical highway speeds. Real-world results, however, can always be different.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Acura ILX 2.4L at $2,000. This figure is based on driving 15,000 miles per year and using national average fuel prices. Of course, the actual amount will vary depending on driving habits, local fuel prices, and the type of fuel used. Some owners may find that the cost is lower, while others who drive aggressively or live in areas with higher gas prices might experience slightly higher expenses. It’s important to keep this in mind as a general guideline.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy for the 2018 Acura ILX is influenced by several factors. Aggressive driving, frequent short trips (where the engine doesn’t reach optimal operating temperature), and neglecting routine maintenance can all negatively impact fuel consumption. Owners who prioritize smooth acceleration, maintain a steady speed, and keep their tires properly inflated are more likely to achieve MPG closer to the EPA estimates. Careful use of the throttle, anticipating traffic flow, and avoiding unnecessary idling can further contribute to improved fuel efficiency. While the 2.4L is reliable, premium fuel is recommended to achieve maximum power and economy.

How it compares

Within the entry-level luxury sedan segment, the 2018 Acura ILX’s fuel economy is competitive, but not class-leading. For example, a similarly equipped 2018 Audi A3 with the 2.0T engine is rated at 29 MPG combined, matching the ILX, but offering standard all-wheel drive. A 2018 BMW 320i, an older and less direct competitor than the A3, achieves around 28 MPG combined. These differences in MPG, seemingly small, can add up over time, though those drawn to the ILX are likely attracted to the ILX MPG across all years and the Acura’s greater reliability reputation. Ultimately, while fuel economy is a consideration, buyers in this segment typically place a higher value on factors like styling, features, and driving dynamics. If fuel economy is the driving concern, other cars from these luxury brands are far superior, but those cars exist on somewhat different planes.

Tips to maximize efficiency

The 2.4L engine in the ILX responds well to gentle acceleration. Avoid aggressive starts and stops, which consume significant fuel. Instead, gradually increase speed and anticipate traffic flow to minimize the need for hard braking. The 8-speed transmission is well-tuned, so allow it to shift smoothly and efficiently without forcing it into lower gears unnecessarily.

Regular maintenance is critical for optimal fuel economy. Ensure that the ILX’s engine is properly tuned, filters are clean, and fluids are at the correct levels. Properly inflated tires also reduce rolling resistance, improving MPG. Check tire pressure at least once a month and maintain the recommended pressure listed on the driver’s side doorjamb.

Minimize unnecessary weight. Remove any items from the trunk or backseat that are not essential. Carrying excess weight puts additional strain on the engine, reducing fuel efficiency. Every 100 pounds reduces fuel economy and hurts acceleration.

Avoid extended idling. If you’re stopped for more than a minute, turn off the engine. Modern engines restart quickly and efficiently, using less fuel than idling. This is especially important in city driving, where idling is common.

Plan your trips strategically. Combine errands into a single trip to reduce the number of cold starts, which are less fuel-efficient. Optimize your route to avoid stop-and-go traffic and congested areas. Planning can reduce reliance on all Acura fuel economy data from various models.