20 MPG combined isn’t going to win any awards, but for the 2020 Genesis G80 RWD with the 3.3L V6, it’s a figure many owners find perfectly acceptable. This isn’t a car bought by penny-pinchers; it’s a comfortable sedan for those who prioritize a smooth ride, elegant styling, and a well-appointed interior over outright fuel efficiency. Buyers of this particular G80 configuration likely value the V6’s responsive power delivery and the rear-wheel-drive dynamics; fuel economy, while certainly a consideration, isn’t the main reason behind their purchase.

City and highway performance

The EPA estimates break down to 17 MPG in the city and 25 MPG on the highway. The city number reflects the reality of stop-and-go traffic, where the G80’s weight and the need to frequently accelerate take their toll. On the open road, however, the G80’s smooth-shifting eight-speed automatic transmission helps the engine settle into a more relaxed cruising speed. The highway figure is attainable, even if you’re carrying passengers and luggage. It represents a reasonable compromise for a car designed to eat up long distances in comfort and style. While not class-leading, 25 MPG highway will get travelers from point-A to point-B with the cruise control on.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Genesis G80 RWD 3.3L V6 at $2,900. This figure is based on driving 15,000 miles per year and using national average fuel prices. Your actual fuel costs will vary based on your driving habits, the type of roads you frequent, and the price of gasoline in your area. Someone who primarily drives in congested urban environments will likely exceed this estimate, while someone who mostly clocks highway miles could potentially come in under it. This figure serves as a good baseline for comparison when you’re researching all Genesis fuel economy data and other vehicles in this class.

Real-world expectations

While the EPA numbers provide a useful benchmark, real-world fuel economy often differs. In mixed driving conditions, expect something closer to 19 MPG. Aggressive driving, frequent short trips, and heavy traffic will all negatively impact fuel efficiency. On the other hand, consistent highway driving at moderate speeds during warmer conditions can yield slightly better numbers than the EPA predicts. The G80’s driver-selectable modes, including “Eco,” can help optimize fuel efficiency, but the most significant factor remains driver behavior.

How it compares

Compared to its competitors, the 2020 Genesis G80 RWD 3.3L V6 lands in the middle of the pack. The Lexus ES 350, for example, achieves a combined 26 MPG, making it a significantly more fuel-efficient option. The BMW 540i, with its turbocharged inline-six, offers a comparable 25 MPG combined, but provides more engaging driving dynamics. At the lower end, the Mercedes-Benz E450 4MATIC, with its standard all-wheel drive, delivers around 23 MPG combined. The person considering the G80 likely appreciates its unique blend of luxury, value, and understated elegance, and will accept the fuel economy trade-off in exchange for the car’s other virtues. Buyers should also investigate G80 MPG across all years to fully understand its fuel consumption characteristics.

Tips to maximize efficiency

Use the “Eco” driving mode during routine commutes. This mode adjusts throttle response and transmission shift points to prioritize fuel efficiency. While it slightly reduces responsiveness, it can make a noticeable difference in city driving.

Maintain proper tire inflation. Under-inflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended level, which can be found on the sticker inside the driver’s side door jamb.

Avoid aggressive acceleration and braking. Smooth, gradual inputs will help the engine operate more efficiently. Anticipate traffic flow and try to maintain a consistent speed to minimize unnecessary energy expenditure.

Keep your car well-maintained. Regular oil changes, air filter replacements, and spark plug maintenance ensure the engine runs optimally. A poorly maintained engine will be less efficient and can negatively impact fuel economy.

Minimize idling. If you’re stopped for more than a minute or two, turn off the engine. Idling consumes fuel without covering any distance. Restarting the engine consumes much less fuel than letting your vehicle idle longer than necessary.