28 MPG combined isn’t going to set any records, but it’s a respectable figure for the 2016 Buick LaCrosse eAssist. More importantly, it speaks to the car’s core mission: providing a comfortable, spacious, and relatively efficient full-size sedan for those prioritizing value and ease of use. This isn’t a sport sedan; it’s a Buick, designed for effortless cruising and relaxed driving. The eAssist system, a mild-hybrid setup, helps squeeze extra mileage from the 2.4L four-cylinder without sacrificing the smooth, quiet operation expected of a LaCrosse.

City and highway performance

The 2016 LaCrosse eAssist delivers 24 MPG in the city and a more impressive 35 MPG on the highway. The city figure reflects the reality of stop-and-go driving, where the eAssist system’s regenerative braking and start/stop functions work to recoup energy and reduce fuel consumption. The highway number highlights the engine’s efficiency at a steady speed, aided by the six-speed automatic transmission and the car’s aerodynamic profile. These numbers aren’t targeted at those who demand high performance. It’s for drivers who spend considerable time on the highway and want the comfort of a large sedan without the fuel bill typically associated with V6 or V8 engines.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2016 Buick LaCrosse eAssist is $1,550. This figure is based on driving 15,000 miles per year and using national average fuel prices. Keep in mind that your actual fuel costs may vary depending on your driving habits, the type of roads you typically drive on, and local fuel prices. This is not an exact science, but the EPA estimate provides a useful benchmark for comparing fuel costs across different vehicles and also allows the consumer to calculate a rough estimate.

Real-world expectations

While the EPA estimates are a good starting point, real-world fuel economy can vary. LaCrosse eAssist owners frequently report figures close to the official numbers, but driving style and terrain play a significant role. Aggressive acceleration, frequent hard braking, and driving in hilly areas will reduce fuel economy. Conversely, consistent highway cruising at moderate speeds will likely yield results at or above the EPA’s 35 MPG estimate. Properly maintaining the vehicle, including tire pressure and regular servicing, will also ensure optimal fuel efficiency. If you’re shopping for a LaCrosse eAssist, and regularly travel a route at 70mph or less, you will very likely realize the EPA highway of 35 MPG.

How it compares

When considering fuel economy in the full-size sedan segment, the 2016 LaCrosse eAssist holds its own, though not always on top. For example, a comparable 2016 Toyota Avalon Hybrid achieves around 40 MPG combined, prioritizing fuel efficiency above all else. However, the Avalon Hybrid also carries a higher price tag. A similarly sized V6 powered Nissan Maxima from the same year averages around 25 MPG combined. Although the Maxima wins on performance, the LaCrosse eAssist offers comparable comfort and interior space with superior fuel economy. For buyers choosing between these vehicles, fuel economy, not outright performance, is obviously a key decision factor. You can also compare all Buick fuel economy data to understand where this LaCrosse sits within the brand’s broader lineup, or research LACROSSE MPG across all years to see how the eAssist model compares to other LaCrosse variants.

Tips to maximize efficiency

Take advantage of the LaCrosse eAssist’s regenerative braking system. Smooth, gradual braking allows the system to capture the maximum amount of energy, converting it back into electricity to recharge the battery. Avoid hard braking whenever possible, as this wastes energy and reduces fuel economy.

Use cruise control on the highway. Maintaining a consistent speed minimizes unnecessary acceleration and deceleration, which improves fuel efficiency. The LaCrosse eAssist is designed for relaxed cruising, so let the cruise control do the work and save fuel in the process.

Check your tire pressure regularly. Underinflated tires increase rolling resistance, which reduces fuel economy. Consult the sticker on the driver’s side doorjamb for the recommended tire pressure and ensure your tires are properly inflated. Given proper maintenance, these tires will also experience more even wear and last much longer.

Minimize idling. Excessive idling consumes fuel without moving the car. If you’re stopped for more than a minute or two, turn off the engine. The LaCrosse eAssist also features an auto stop/start system that turns off the engine when stopped, make sure this feature is enabled (if equipped and you prefer its operation) to maximize fuel savings in city driving.