52 MPG combined. That’s the headline, and it’s the reason the 2021 Hyundai Sonata Hybrid Blue exists. This isn’t a performance car; it isn’t trying to be sporty. It’s a comfortable, spacious mid-size sedan designed to minimize fuel consumption. The Blue trim, in particular, is the most efficient within the Sonata Hybrid lineup, appealing to consumers who want low running costs above all else. They aren’t necessarily looking for luxury or cutting-edge tech, but a rational, reliable, and remarkably efficient family car.

City and highway performance

The EPA estimates suggest a slight edge for highway driving, with 54 MPG compared to 50 MPG in the city. This is somewhat unusual for a hybrid, where city driving often unlocks greater fuel savings due to regenerative braking and electric motor assistance at lower speeds. However, the Sonata Hybrid Blue is optimized for consistent, smooth cruising. The 2.0L 4-cylinder engine, paired with the automatic (AM-S6) transmission, works with the electric motor to maintain optimal efficiency at highway speeds. In city environments, diligent use of regenerative braking and a light foot on the accelerator are key to replicating those impressive EPA numbers.

Annual fuel cost

The EPA estimates that the 2021 Hyundai Sonata Hybrid Blue will cost $850 per year to fuel. This figure is based on driving 15,000 miles annually, using national average fuel prices. Of course, your actual fuel costs will vary depending on your driving habits, the type of roads you normally drive on, and local fuel prices. But the $850 figure provides a benchmark, allowing potential buyers to directly compare running costs of the Sonata Hybrid Blue against other vehicles. It’s an argument for those prioritizing fuel efficiency, and a huge draw for high-mileage drivers.

Real-world expectations

While the EPA figures provide a useful guide, real-world fuel economy often differs. Achieving the rated 52 MPG combined requires efficient driving and maintaining the vehicle properly. Aggressive acceleration, frequent hard braking, and extended idling will reduce fuel economy. Similarly, neglecting basic maintenance such as tire inflation and regular servicing can negatively impact efficiency. However, even with less-than-perfect driving habits, owners of the Sonata Hybrid Blue can reasonably expect to achieve fuel economy figures significantly above the average gasoline-powered sedan.

How it compares

In the mid-size hybrid sedan segment, the Sonata Hybrid Blue faces competition. The Toyota Camry Hybrid LE, for instance, boasts a combined MPG of 52, matching the Sonata Hybrid Blue spec-for-spec. The Honda Accord Hybrid achieves 48 MPG combined. While those other hybrids offer packages, the Sonata Hybrid Blue distinguishes itself with a spacious interior, comfortable ride, and reliable hybrid powertrain technology. For some buyers, the different design will be another factor.

Tips to maximize efficiency

Anticipate traffic flow and avoid sudden acceleration or braking. The Sonata Hybrid’s regenerative braking system is most effective when used smoothly and progressively. Learn to coast to red lights and stop signs, allowing the electric motor to recapture energy and reduce the need for friction braking.

Maintain optimal tire pressure. Under-inflated tires increase rolling resistance, which directly impacts fuel economy. Check your tire pressure regularly and inflate them to the recommended levels, typically found on a sticker inside the driver’s side door jamb. Small changes in tire pressure can make a big difference in overall efficiency.

Minimize the use of accessories like air conditioning and heated seats. These systems draw power from the engine and the hybrid battery, reducing fuel economy. Use them when needed, and consider using the fan or opening windows when appropriate. Preconditioning the cabin while plugged in also improves range.

Use ECO mode. The Sonata Hybrid Blue includes a selectable ECO mode that optimizes engine and transmission settings for maximum fuel efficiency. This mode may slightly reduce throttle response, but it can improve MPG, especially during city driving. Familiarize yourself with all Hyundai fuel economy data to see how this technology is performing across the brand.

Keep the vehicle properly maintained. Regular oil changes, air filter replacements, and spark plug maintenance ensure the engine is running efficiently. A well-maintained engine burns fuel more efficiently, leading to improved fuel economy. Also, compare SONATA MPG across all years to get a sense of the reliability of its fuel consumption.