33 MPG combined is an interesting figure when discussing the 2015 Cadillac ELR. It’s not abysmal, especially for a luxury car of this era, but it also doesn’t tell the whole story of this plug-in hybrid coupe. The ELR isn’t about outright efficiency; it’s about making a statement, and for a certain type of buyer, that statement is powerful enough to overcome any qualms about fuel consumption.

City and highway performance

The EPA estimates the 2015 Cadillac ELR will achieve 31 MPG in the city and 35 MPG on the highway. These numbers are somewhat misleading, however, as they only reflect the ELR’s performance when running on gasoline after the battery pack has been depleted. When operating solely on electricity, the ELR offers impressive MPGe (miles per gallon equivalent) figures, drastically reducing fuel consumption for shorter commutes and around-town driving. The variable gear ratio automatic transmission is programmed to maximize efficiency, smoothly blending electric and gasoline power. The reality is owners plugging in regularly can expect fuel economy considerably better than the EPA estimates which is reflected in the ELR’s mission as a luxury, extended-range EV.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Cadillac ELR to be $1,750. This figure is based on driving 15,000 miles per year, with a specific percentage of those miles driven in the city versus on the highway, and using national average fuel prices. While this number provides a benchmark, it’s important to remember that your actual fuel costs will vary depending on your driving habits, the proportion of electric-only driving, and local gasoline prices. Someone who primarily uses their ELR for short commutes and charges it daily could easily spend significantly less than $1,750 annually on fuel. Conversely, someone who relies more heavily on the gasoline engine could potentially spend even more, especially if driving aggressively.

Real-world expectations

Real-world fuel economy with the 2015 ELR is wildly dependent on driving style and charging habits. Owners who diligently plug in the vehicle every night and primarily use it for shorter trips can often achieve triple-digit MPGe figures. Frequent and aggressive acceleration, or long highway trips without charging, will result in fuel economy closer to the EPA’s 33 MPG combined estimate, or even lower. The ELR is best suited for drivers with predictable daily routines and access to convenient charging. It shines as a commuter vehicle, allowing drivers to complete most of their daily driving on electric power alone. Drivers should be aware of the vehicle’s battery range and plan their trips accordingly to maximise electrical driving. The ELR rewards driving habits that reduce fuel costs. You can find ELR MPG across all years on our site.

How it compares

Compared to other luxury vehicles of its era, the 2015 Cadillac ELR occupies a unique position. It outperforms conventionally-powered luxury coupes like the BMW 428i (27 MPG combined) and the Mercedes-Benz C300 Coupe (25 MPG combined) when factoring in electric operation. However, it falls short of the efficiency offered by dedicated EVs like the BMW i3 (124 MPGe combined) and the Nissan LEAF (114 MPGe combined), though those vehicles lacked the ELR’s extended range capabilities. The ELR’s closest direct competitor was arguably the Chevrolet Volt (37 MPG combined), which offered similar plug-in hybrid technology at a significantly lower price point, albeit with a less luxurious interior. The comparison matters because the ELR wasn’t purchased for outright fuel savings above all else. Its buyers were willing to pay a premium for its unique styling and Cadillac cachet, accepting a somewhat lower MPG number as a trade-off for an upscale, technologically advanced driving experience. For all Cadillac fuel economy data, visit our brand page.

Tips to maximize efficiency

Charge during off-peak hours. Electricity rates often vary depending on the time of day, with off-peak hours offering significantly lower prices. Charging your ELR during these times can substantially reduce your overall energy costs.

Minimize aggressive acceleration. The ELR’s electric motor provides instant torque, making it tempting to accelerate quickly. However, frequent bursts of speed drain the battery faster and reduce overall efficiency. Aim for smooth, gradual acceleration to maximize your electric range.

Use regenerative braking. The ELR features regenerative braking, which captures energy during deceleration and feeds it back into the battery. Practice coasting whenever possible and use a light touch on the brake pedal to maximize energy recovery.

Precondition the cabin. Before unplugging, use the ELR’s remote climate control feature to pre-heat or pre-cool the cabin while the vehicle is still connected to the charger. This reduces the energy needed to reach your desired temperature while driving, extending your electric range.

Maintain correct tire pressure. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Regularly check your tire pressure and inflate them to the recommended level to optimize your ELR’s performance.