26 MPG combined is a respectable figure for the 2019 Lexus GS 300, but it’s more than just a number. It’s not a hybrid maximizing every drop; it’s a mid-size luxury sedan prioritizing refinement and composed handling, and those priorities have consequences. While not the best in its class, this fuel economy is a reasonable compromise for buyers wanting a comfortable, well-appointed vehicle with Lexus’s reputation for reliability. These buyers often care less about maximizing every mile per gallon and more about a smooth ride, a quiet cabin, and the peace of mind that comes with owning a Lexus.

City and highway performance

The EPA estimates the GS 300 gets 22 MPG in the city and 32 MPG on the highway. The city number acknowledges the inherent inefficiencies of stop-and-go driving, showing the engine working harder, and the automatic transmission shifting more frequently. The highway figure, however, shows the 2.0L turbocharged four-cylinder’s ability to cruise efficiently once it’s up to speed. That 32 MPG really showcases this engine’s character when it’s not facing the demands of urban driving. The eight-speed automatic transmission also helps by keeping the engine in its optimal powerband on the highway.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2019 Lexus GS 300 at $2,250. This figure is based on driving 15,000 miles per year, split roughly 55% city and 45% highway, and using the national average fuel price. Individual expenses will vary depending on driving habits and location, but this provides a standardized benchmark for comparison. It’s a tangible number that helps potential buyers realistically assess the ongoing cost of owning this Lexus.

Real-world expectations

The EPA provides a standardized test cycle, but real-world fuel economy can be different. If you drive smoothly and conservatively, avoiding hard acceleration and unnecessary braking, expect figures closer to the EPA estimates. Aggressive drivers might see numbers drop below 20 MPG in the city. On the other hand, those who spend a lot of time on the highway, especially at consistent speeds, could exceed the 32 MPG rating. Think about your typical driving conditions when evaluating the GS 300’s potential fuel costs. Meticulous maintenance, including timely oil changes and tire inflation, also has a significant impact on real-world fuel economy.

How it compares

The GS 300’s MPG is within a competitive range, but there are other choices. A 2019 BMW 530i, also featuring a 2.0L turbocharged four-cylinder, has a combined EPA rating of 27 MPG, slightly better than the GS 300, and might appeal to buyers wanting maximum efficiency. Lexus itself offers other options. The hybrid GS 450h, though discontinued, offered a much better 31 MPG combined, attracting buyers willing to trade some trunk space for better fuel economy. Reviewing all Lexus fuel economy data is important when selecting the Lexus that is right for you. Even the V6-powered Acura TLX SH-AWD provides nearly identical fuel economy at 25 MPG combined; you’ll sacrifice a small amount of fuel economy for improved all-weather capability. The GS 300’s fuel economy is a good balance; it’s not the main selling point, but its competitiveness lets buyers prioritize other things like styling, features, and brand reputation. Exploring GS MPG across all years can provide a more general understanding of the model’s fuel economy over time.

Tips to maximize efficiency

Use the GS 300’s drive modes. Choosing “Eco” mode adjusts throttle response and transmission mapping to prioritize fuel conservation, often leading to noticeable improvements in city driving. Don’t expect a huge change, but over time, it can add up.

Gentle acceleration and smooth braking are important. The less aggressively you drive, the less gas you’ll use. Watch traffic flow and avoid hard stops, because these actions make the engine work harder and use more fuel to get back up to speed.

Check your tire pressure regularly and keep your tires properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check the sticker on the driver’s side doorjamb for the recommended tire pressure, and check your tires at least once a month.

Minimize idling. If you’re stopped for more than a minute, it’s usually better to turn off the engine. Modern engines restart quickly and reliably, and idling wastes gas and emits pollutants.

Don’t carry extra weight in your vehicle. Extra weight strains the engine, which reduces fuel economy. Remove unnecessary items from your trunk and back seats.