For those buying a 2018 Lexus RC 350 with the 3.5L V6, 23 MPG combined isn’t usually the main concern. Buyers typically want a stylish, comfortable, and reliable luxury sport coupe. Fuel economy is secondary to the RC 350’s aggressive styling, its smooth and powerful engine, and the comfortable interior that Lexus is known for; 23 MPG is simply a consideration.

City and highway performance

The 2018 RC 350 has EPA ratings of 20 MPG in the city and 28 MPG on the highway. The city figure reflects the reality of stop-and-go driving, where the engine spends more time idling and accelerating. The 28 MPG highway rating is achievable, but requires a light foot and consistent speeds. Using cruise control on relatively flat stretches of highway will provide the best results.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Lexus RC 350 at $2,500. This calculation is based on driving 15,000 miles per year, with 55% of the miles driven in the city and 45% on the highway. The EPA also assumes a consistent national average fuel price, so fluctuations in local fuel prices will impact your actual costs.

Real-world expectations

While the EPA ratings provide a baseline, real-world fuel economy will vary depending on driving habits and conditions. Drivers who tend to push often with the RC 350’s available power will likely see fuel economy figures closer to the city rating, or even below. On the other hand, those who prioritize fuel efficiency and drive more conservatively may be able to exceed the highway rating, especially on long road trips.

How it compares

The RC 350’s fuel economy is about average compared to its competitors. A 2018 BMW 440i Coupe, for example, is rated at 25 MPG combined with its turbocharged inline-six, which is slightly better. The Infiniti Q60 Red Sport 400, with its twin-turbo V6, is slightly lower at 22 MPG combined. The Audi S5 Coupe, with its turbocharged V6 and standard all-wheel drive, manages a respectable 24 MPG combined.

For buyers cross-shopping these vehicles, the differences in fuel economy may be less important than factors like styling, performance, and features, but the Lexus’ lower fuel cost compared to the Infiniti could come into play. You can compare RC MPG across all years.

Tips to maximize efficiency

Avoid aggressive acceleration and hard braking. The RC 350’s V6 is responsive, but using its full potential with frequent bursts of speed will quickly deplete fuel. Instead, focus on smooth, gradual acceleration and anticipate traffic conditions to minimize the need for sudden braking.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressure regularly and inflate them to the recommended pressure listed on the driver’s side door jamb.

Minimize idling. If you’re stopped for more than a minute, turn off the engine. Modern engines are designed to restart quickly and easily, and idling consumes fuel without moving the vehicle. This is especially relevant near schools or in congested urban areas.

Use the available drive modes effectively. The RC 350 typically offers Eco, Normal, and Sport modes. Select Eco mode when fuel efficiency is the main concern, as it adjusts the throttle response and transmission shift points to maximize MPG.

Consider reducing overall weight in the vehicle. Items in the trunk or back seat add weight that the engine must work to move, impacting efficiency. Remove unnecessary items that are weighing the car down and adding to fuel consumption. For all Lexus fuel economy data, FuelEconomyHub.com is your best resource.