The standard engine on the 2026 Buick Encore GX Preferred trim is a turbocharged 1.2-liter inline-3 producing 137 horsepower and 162 lb-ft of torque, paired with a Continuously Variable Transmission. This configuration achieves an EPA-estimated 30 mpg city, 31 mpg highway, and 30 mpg combined, making it the most fuel-efficient engine in the Encore GX lineup. This engine is also configured to run on either E85 ethanol blend fuel or standard gasoline.

Optional on the Preferred FWD model and standard on Sport Touring, Avenir, and all AWD models is a turbocharged 1.3-liter inline-3 engine producing 155 horsepower and 174 lb-ft of torque. With front-wheel drive, this engine achieves an EPA-estimated 29 mpg city, 31 mpg highway, and 30 mpg combined. AWD models pair this engine with a 9-speed automatic transmission instead of the CVT and are EPA-estimated at 26 mpg city, 28 mpg highway, and 27 mpg combined.

• 1.2L turbo (FWD): 30 mpg city / 31 mpg highway / 30 mpg combined
• 1.3L turbo (FWD): 29 mpg city / 31 mpg highway / 30 mpg combined
• 1.3L turbo (AWD): 26 mpg city / 28 mpg highway / 27 mpg combined
• 1.2L engine compatible with E85 ethanol blend or standard gasoline
• AWD models use a 9-speed automatic in place of the CVT

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Both 2026 Buick Encore GX engines include Automatic Stop/Start technology, which temporarily shuts off the engine when the vehicle comes to a complete stop and restarts it within milliseconds once the driver releases the brake. This feature can be disabled using a button on the center console for drivers who prefer continuous engine operation. The engines also use an electronically controlled thermostat and clutched water pump, which allow the engine to warm up faster and maintain a more precise operating temperature, contributing to both efficiency and reduced wear over time.

• Automatic Stop/Start technology on both engine options
• Stop/Start can be disabled via center console button
• Electronically controlled thermostat for faster warm-up
• Clutched water pump helps maintain precise operating temperature

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Drivers who prioritize maximum fuel efficiency and primarily drive in suburban or city conditions will find the 1.2-liter FWD configuration the most economical choice in the lineup. Drivers who want a small additional step in power while maintaining strong fuel economy can consider the 1.3-liter FWD option, which delivers nearly identical combined fuel economy. For drivers in the Chicago area who want all-weather traction for winter driving, the AWD-equipped 1.3-liter offers a reasonable fuel economy trade-off in exchange for added confidence in rain and snow.

• 1.2L FWD: best choice for maximum fuel efficiency
• 1.3L FWD: similar fuel economy with a modest power increase
• 1.3L AWD: best choice for all-weather traction with a moderate fuel economy trade-off

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