18 MPG combined might deter some shoppers, but it’s arguably acceptable for the 2015 Lexus LS 460 L AWD. This car isn’t built for saving gas on commutes. It’s a long-wheelbase luxury sedan designed for quiet comfort, easy power, and confidence in all weather. Buyers understand these features affect fuel consumption.

City and highway performance

The LS 460 L AWD gets an EPA-estimated 16 MPG in the city. Stop-and-go driving and the weight of the all-wheel-drive system contribute to this lower number.

On the open highway, the 4.6L V8 cruises easily, allowing for a slightly better 23 MPG rating. While the highway number is respectable for a large, powerful sedan, it won’t win any fuel economy awards. The eight-speed automatic transmission helps optimize fuel use at higher speeds, but the engine size ultimately determines gas consumption.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Lexus LS 460 L AWD at $3,200. This is based on driving 15,000 miles per year and current national average fuel prices. Individual fuel costs will vary based on driving habits, local fuel prices, and fuel type. The LS 460 L recommends premium fuel for best performance, which increases the annual fuel cost.

Real-world expectations

While the EPA provides an estimate, real-world fuel economy often differs. Drivers who accelerate quickly or frequently drive in urban areas will likely see numbers below the EPA estimates. Drivers who accelerate smoothly and maintain consistent highway speeds might achieve figures closer to, or even slightly above, the EPA’s 23 MPG highway rating.

Regular maintenance, including tire inflation and air filter replacement, is also important for the best gas mileage. Check owner forums and online communities to see what other LS 460 L AWD owners experience.

How it compares

The 2015 Lexus LS 460 L AWD competes with other large, all-wheel-drive luxury sedans. The BMW 750i xDrive delivers similar performance and luxury but gets a slightly better combined MPG of 19. The Mercedes-Benz S550 4Matic offers a similar experience and also returns around 19 MPG combined. The Audi A8 3.0T Quattro gets even better fuel economy, reaching 22 MPG combined, thanks to its smaller engine. The LS 460 L’s fuel economy isn’t the best in its class but Lexus buyers often value reliability and a comfortable ride more than saving on gas. If you are interested in all Lexus fuel economy data, you can view it here.

Tips to maximize efficiency

Anticipate traffic flow to minimize unnecessary braking and acceleration. The LS 460 L’s weight means that each time you brake, you’re losing energy that the engine then needs to replace. Drive gently and predictably to get the best gas mileage in a large, powerful sedan.

Make sure your tires are properly inflated. Low tire pressure increases rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the manufacturer’s recommended level, found on a sticker inside the driver’s side doorjamb.

Avoid long periods of idling. If you anticipate waiting for more than a minute, turn off the engine. Idling wastes fuel without covering any distance, greatly impacting your MPG, especially in city driving. Modern engines are designed to restart quickly and efficiently, making this a simple way to save fuel.

If your LS 460 L has it, use the “Eco” driving mode. This mode adjusts the throttle response and shift patterns to focus on fuel savings over performance. While it might slightly reduce acceleration, it can improve MPG, especially during routine commutes.

Keep up with scheduled maintenance. A well-maintained engine runs more efficiently. Regular oil changes, air filter replacements, and spark plug inspections are critical for optimizing fuel economy. Neglecting maintenance can decrease performance and increase fuel consumption. Considering a different LS? Compare LS MPG across all years.