19 MPG combined isn’t going to win any fuel economy awards, but it accurately reflects the 2015 Lexus LS 460’s mission: quiet, unruffled luxury rather than low fuel consumption. This is a car for executives, for those who value silence and isolation from the outside world, and for whom the cost of gasoline is a secondary consideration. They’re buying library-quiet operation and a cosseting ride, and the 4.6-liter V8 is a key ingredient of that experience.

City and highway performance

The LS 460’s EPA ratings break down to 16 MPG in the city and 24 MPG on the highway. The city figure is the more sobering of the two, especially if the car spends significant time idling in traffic. While the eight-speed automatic transmission helps maximize efficiency, stop-and-go driving always penalizes larger, more powerful engines. On the open road, the 24 MPG figure is respectable, allowing for decent range between fill-ups. However, even that number falls short of some competitors who have embraced turbocharging or hybrid technology, something to consider when benchmarking LS MPG across all years.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2015 Lexus LS 460 is $3,050. This figure is based on driving 15,000 miles per year and using national average fuel prices for premium gasoline, which the LS 460 requires. It’s important to remember that your personal fuel costs will vary depending on your driving habits, the actual price of gasoline in your area, and how much of your driving is done in city versus highway conditions. Someone who primarily drives short distances in urban areas will likely spend significantly more than $3,050, while someone who does mostly highway driving may spend less. The EPA figure provides a useful baseline for comparison.

Real-world expectations

While the EPA provides standardized testing, real-world fuel economy often deviates. LS 460 owners typically report figures that are close to the EPA estimates, but factors like aggressive driving, extreme weather conditions, and even tire pressure can impact fuel consumption. Owners who prioritize smooth acceleration and consistent speeds are more likely to achieve the advertised numbers, while those with a heavier foot may see their MPG drop into the low teens in city driving. Regular maintenance, including timely oil changes and air filter replacements, also contributes to optimal efficiency.

How it compares

The LS 460’s fuel economy places it squarely in the middle of its competitive set. The BMW 740i from the same year, equipped with its turbocharged six-cylinder, achieves a slightly better 22 MPG combined. The Mercedes-Benz S550, with its more powerful V8, lands in a similar range to the LS 460. However, the Audi A8 3.0T achieves a higher 23 MPG combined, demonstrating that there are more efficient options in this class if fuel economy is a top priority. These numbers are important for buyers who may be cross-shopping these vehicles, as they highlight the trade-offs between power, luxury, and efficiency.

Tips to maximize efficiency

Given the LS 460’s powertrain and size, smooth and gradual acceleration is key to conserving fuel. Avoid aggressive starts and hard braking, as these actions consume unnecessary energy. Anticipating traffic flow and maintaining a consistent speed whenever possible will also lead to improved MPG.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended levels, which can be found on the sticker located on the driver’s side door jamb.

Minimize idling. The LS 460’s V8 burns fuel even when the car is stationary. If you anticipate being stopped for more than a minute or two, it’s best to turn off the engine. This is particularly relevant in city driving, where frequent stoplights and traffic jams are common.

Consider using the LS 460’s “Eco” driving mode, if equipped. This mode adjusts the throttle response and transmission mapping to prioritize fuel efficiency over performance. While it may slightly reduce acceleration, it can contribute to noticeable savings on longer trips.

Regular maintenance is important. Keep your engine properly tuned and ensure that all scheduled maintenance is performed on time. A well-maintained engine operates more efficiently and consumes less fuel. Don’t forget to check all Lexus fuel economy data.