21 MPG combined might seem lackluster, but for the 2018 BMW X5 sDrive35i, it’s an acceptable trade-off. This isn’t a vehicle purchased for hypermiling; it’s a luxury-oriented SUV designed for comfort, performance, and making a statement. The rear-wheel-drive sDrive35i trim appeals to those who appreciate the BMW driving experience without prioritizing all-wheel-drive capability, often residing in climates where AWD isn’t a necessity.

City and highway performance

The EPA estimates for the X5 sDrive35i are 18 MPG in the city and 25 MPG on the highway. The city figure reflects the stop-and-go driving and idling inherent to urban environments. The 3.0L inline-6, while smooth and responsive, requires more fuel to repeatedly accelerate the X5’s substantial mass. The 25 MPG highway rating shows the engine’s efficiency at sustained speeds, where the eight-speed automatic transmission can settle into higher gears and the engine operates within its optimal efficiency range. Keep in mind that speed and driving style can greatly affect that highway number; consistent aggressive speeding will see this number quickly decline.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2018 BMW X5 sDrive35i is $2,750. This figure is based on driving 15,000 miles per year and using national average fuel prices. It provides a standardized benchmark for comparing the X5’s fuel expenses with those of other vehicles. Buyers considering the X5 should weigh this cost against their individual driving habits and local fuel prices, as these factors can significantly influence real-world expenses.

Real-world expectations

While the EPA estimates provide a useful baseline, real-world fuel economy often deviates. Drivers with a heavy foot, frequent short trips, or mostly city driving may find their MPG closer to the 18 MPG city rating. On the other hand, those who predominantly drive on the highway and practice efficient driving habits could potentially exceed the 25 MPG highway figure. The X5’s onboard computer provides real-time and average fuel economy data, allowing drivers to monitor their performance and adjust their driving accordingly.

How it compares

The 2018 BMW X5 sDrive35i’s fuel economy sits in the middle of the pack for its class. A comparable Mercedes-Benz GLE350 from the same year achieves an EPA-estimated 19 MPG combined. An Acura MDX, known for its reliability and efficiency, delivers around 22 MPG combined. However, the Acura forgoes some of the BMW’s characteristic driving dynamics and luxury feel. Looking at other BMW options, you’ll see similar trends if you browse X5 MPG across all years. All-wheel-drive versions of the X5, like the xDrive35i, typically see a slight dip in fuel economy compared to the sDrive35i. Those looking at the BMW brand in general should check out all Bmw fuel economy data to get a better understanding of Bmw’s lineup.

Tips to maximize efficiency

Take advantage of the X5’s Eco Pro mode. This driving mode adjusts engine mapping, throttle response, and transmission behavior to prioritize fuel efficiency. It may slightly reduce acceleration, but it can significantly improve fuel economy, especially during city driving.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressure regularly and maintain the recommended pressure specified on the doorjamb sticker.

Minimize idling. Idling consumes fuel without covering any distance. If you anticipate being stationary for more than a minute, switch off the engine. Modern engines are designed for frequent starts and stops, so restarting won’t cause excessive wear.

Avoid aggressive acceleration and braking. Gentle acceleration and gradual braking conserves fuel. Anticipate traffic flow and maintain a steady speed whenever possible. Excessive speeding leads to poorer fuel consumption, and is less safe.

Keep up with scheduled maintenance. Regular oil changes, air filter replacements, and tune-ups ensure your engine is running efficiently. A well-maintained engine consumes less fuel and emits fewer pollutants. Follow the manufacturer’s recommended maintenance schedule to keep your X5 in optimal condition.