Buick · 2016
Regal eAssist 2.4L 4-cyl
✓ EPA Verified
Regular Gasoline
Midsize Cars
Front-Wheel Drive
City
24
MPG
Combined
28
MPG
Highway
35
MPG
Annual Fuel Cost
$1,550
Based on 15,000 miles/year · EPA estimates
vs avg gas vehicle
$600
saved per year
Class Comparison — Midsize Cars
Top 47%
Better than 53 out of 100 vehicles in its class for fuel efficiency.
This vehicle: 28 MPG
This vehicle
28 MPG
Class average
35 MPG
Class lowest
13 MPG
EPA Energy & Environment Scores
7
Energy Score
Out of 10
7
GHG Score
Out of 10
312 lbs
Annual CO₂
g/mile tailpipe CO₂
Yes
Start-Stop
Auto stop-start
Vehicle Specifications
Engine2.4L 4-cyl
TransmissionAutomatic (S6)
DriveFront-Wheel Drive
Fuel TypeRegular Gasoline
Vehicle ClassMidsize Cars
TrimHybrid
Engine DescSIDI; eAssist
Start-StopYes
EPA Vehicle ID36459

The 2016 Buick Regal eAssist gets 28 MPG combined, positioning this mild-hybrid sedan uniquely. It’s not trying to compete with the Prius but it is aimed at buyers who want a comfortable, well-equipped sedan and are willing to trade driving thrills for respectable fuel economy. The Regal eAssist is for those upgrading from older, less efficient vehicles or downsizing from larger sedans who value Buick’s reputation for quiet interiors and a comfortable ride over all-out performance. This generation Regal prioritizes a smooth, isolating experience, and the eAssist model enhances that with improved mileage.

city and highway performance

The Regal eAssist achieves an EPA-estimated 24 MPG in the city and a more impressive 35 MPG on the highway. These numbers show where the eAssist system works best. The electric motor provides a boost during initial acceleration and helps the engine shut down during stops, which significantly boosts city fuel economy. The benefits are more subtle on the highway. While 35 MPG is respectable, aerodynamic efficiency and careful throttle management are key. The six-speed automatic transmission is geared for relaxed cruising, further contributing to its highway efficiency. Drivers who spend more time on open roads will naturally see better overall fuel economy than those primarily commuting in stop-and-go traffic.

annual fuel cost

The EPA estimates the annual fuel cost for the 2016 Buick Regal eAssist at $1,550. This figure is based on driving 15,000 miles per year and using national average fuel prices. It is important to remember that individual driving habits, local fuel prices, and the type of fuel used can all impact this number significantly. For instance, aggressive driving or using premium fuel will likely increase your annual fuel expenditure. Regular unleaded is perfectly suitable for the 2.4L engine, so there is no need to reach for high-octane fuel.

real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy can vary greatly. A driver who frequently accelerates hard will likely see figures closer to the low 20s. However, a careful driver who anticipates traffic and uses cruise control effectively can easily match or even exceed the EPA highway estimate. Environmental factors like temperature, wind resistance, and tire pressure can also play a role. Keep your tires properly inflated and avoid unnecessary idling to maximize your fuel savings. The Regal eAssist’s mild-hybrid system is relatively smooth, so adapting your driving style to benefit from it won’t require a dramatic change to your everyday routine.

how it compares

Compared to its competitors in 2016, the Regal eAssist offered a notable advantage in fuel economy. For example, the Honda Accord offered similar space, but its non-hybrid 2.4L engine delivered around 27 MPG combined, slightly less than the Regal. The Toyota Camry, a perennial favorite, hovered around 28 MPG with its standard engine, matching the Regal but without the mild-hybrid technology. More luxurious options like the Acura TLX with the 2.4L engine delivered around 25 MPG combined. Buyers choosing the Regal eAssist were often prioritizing fuel efficiency without sacrificing the comfort and features expected from a near-luxury sedan. Looking at all Buick fuel economy data, it’s clear the eAssist model was positioned as a fuel-conscious offering compared to other engines in the Buick lineup. Drivers concerned with long-term fuel costs frequently cross-shop these type of vehicles when looking into the REGAL MPG across all years.

tips to maximize efficiency

The Buick Regal eAssist, with its mild-hybrid system, responds well to smooth and predictable driving. Avoid sudden acceleration and braking to allow the regenerative braking system to capture energy and recharge the battery. This is especially effective in city driving, where frequent stops provide ample opportunity for regeneration. Anticipate traffic flow and maintain a consistent speed whenever possible.

Proper tire inflation is critical for maximizing fuel economy. Ensure your tires are inflated to the manufacturer’s recommended pressure, which can be found on a sticker inside the driver’s side doorjamb. Under-inflated tires create more rolling resistance, forcing the engine to work harder and consume more fuel. Regularly checking and adjusting your tire pressure is a simple yet effective way to improve your MPG.

Reduce unnecessary weight in the vehicle. Carrying extra cargo in the trunk or backseat adds to the vehicle’s load, which in turn increases fuel consumption. Remove any items that are not essential for your daily driving. Even small amounts of weight can add up over time, leading to a noticeable decrease in fuel efficiency.

Minimize idling. The Regal eAssist features an auto-stop function that shuts off the engine when the vehicle is stationary, saving fuel. However, prolonged idling in situations where the engine isn’t automatically shut off can still waste fuel. If you anticipate waiting for more than a minute, turn off the engine to conserve fuel and reduce emissions. Restarting the modern engine is quick and easy, and much more efficient than letting it run unnecessarily.