Fuel Economy by Make
Buick Fuel Economy
18 vehicles with EPA fuel economy data.
EPA publishes fuel-economy figures for 18 Buick model years in our index, spanning 4 models from 2015 to 2025. Across those, combined economy averages 25.9 MPG.
The most efficient is the 2025 Buick Envista at 30 MPG combined; the least is the 2016 Buick Lacrosse at 21 MPG — a spread of 9 MPG across the range. At 15,000 miles a year that gap is worth roughly $900 a year in fuel.
Fuel types represented: regular gasoline, premium gasoline. EPA figures come from a standardized test cycle, so they are comparable between vehicles but will not match what any individual driver sees.