18 MPG combined isn’t going to win any awards, but it’s the reality for the 2015 Hyundai Equus with its sonorous 5.0L V8. This car isn’t about hypermiling; it’s about effortless power and a supremely comfortable ride. The Equus buyer is seeking flagship-level luxury at a price point significantly below its European rivals, and they’re willing to accept the fuel economy penalty that comes with a naturally aspirated V8 engine delivering smooth, confident performance.

City and highway performance

The Equus’s EPA ratings break down to 15 MPG in the city and 23 MPG on the highway. The city figure reflects the engine’s displacement and the car’s considerable curb weight. Stop-and-go driving inevitably takes its toll. The 23 MPG highway figure is due to the smooth-shifting eight-speed automatic transmission, which allows the engine to cruise at relatively low RPM at highway speeds. The car feels relaxed and unhurried on long journeys, eating up miles with ease and providing a quiet experience for both driver and passengers.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Hyundai Equus at $3,200. This figure is based on driving 15,000 miles per year, with a combination of city and highway driving, using national average fuel prices. This number is a key consideration for Equus buyers, who are already aware that running a large-displacement V8 isn’t the most economical choice. However, compared to the purchase price of comparable luxury sedans, this fuel cost can feel more palatable.

Real-world expectations

While the EPA provides a standardized testing procedure, real-world fuel economy always varies based on driving habits, traffic conditions, and terrain. Aggressive acceleration, frequent hard braking, and extended idling will all negatively impact fuel consumption. Likewise, consistently driving at higher speeds on the highway will dip below the 23 MPG rating. Owners who prioritize smooth, consistent driving and use the car’s Eco mode can expect to get closer to the EPA estimates, and perhaps even slightly exceed them in certain conditions. See EQUUS MPG across all years.

How it compares

The Equus’s fuel economy puts it in a specific range within the large luxury sedan segment. A comparable 2015 Lexus LS 460, with its 4.6L V8, achieves roughly the same: 16 MPG city and 24 MPG highway. A BMW 750i from the same year, with its turbocharged 4.4L V8, offers slightly better figures in some cases. This specific engine/chassis choice has shown improved numbers of 17 MPG city and 26 MPG highway. The difference is meaningful if fuel economy is a critical decision point. The Mercedes-Benz S550 from 2015 hovers around 17 MPG combined. The Equus buyer often weighs these European options against budget, feature sets, and warranty, and the fact that comparable vehicles cost substantially more new makes the Equus’s 18 MPG often acceptable.

Tips to maximize efficiency

Engage Eco mode. The Equus features a selectable drive mode system, and Eco mode optimizes various vehicle systems, including throttle response and transmission shift points, to prioritize fuel efficiency. This mode can subtly improve MPG, especially in city driving, without dramatically impacting overall performance.

Monitor your tire pressure religiously. Underinflated tires create more rolling resistance, which forces the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended levels shown on the door jamb sticker.

Avoid aggressive acceleration. The 5.0L V8 offers plenty of power, but flooring the accelerator frequently will significantly diminish fuel economy. Adopt a smooth and progressive driving style, allowing the engine to build power gradually.

Plan your routes strategically. Avoiding stop-and-go traffic and congested areas can significantly improve fuel consumption. Use navigation apps to identify the most efficient routes, even if they are slightly longer in distance.

Keep up with regular maintenance. Ensure your Equus receives regular maintenance, including oil changes and air filter replacements. A well-maintained engine runs more efficiently. Explore all Hyundai fuel economy data for more.