The 2015 Honda Civic’s gasoline trims deliver solid fuel economy, with most versions using the 1.8-liter engine and CVT posting about 34 mpg combined, while the sporty Si model with a 2.4-liter engine and a six-speed manual targets roughly 25 mpg combined.
Fuel economy by trim
EPA fuel-economy estimates for the 2015 Civic vary by model and transmission; the figures below reflect typical configurations sold in the United States.
- 2015 Civic LX/EX/EX-L with 1.8L engine and CVT: 30 mpg city, 39 mpg highway, 34 mpg combined.
- 2015 Civic Si with 2.4L engine and 6-speed manual: 22 mpg city, 31 mpg highway, 25 mpg combined.
Real-world mileage can differ due to driving style, terrain, and maintenance, but these figures provide a reliable baseline for planning fuel costs.
Notes on variants
Civic Hybrid
The 2015 Civic Hybrid, not included in the gasoline trims above, used a different powertrain and posted higher mpg, typically in the mid-40s combined, depending on configuration and driving conditions.
Summary
In 2015, the Honda Civic offered strong highway efficiency in its standard trims and lower efficiency for the Si. Expect about 34 mpg combined for the 1.8L CVT models and around 25 mpg combined for the Si in typical driving, with real-world mileage varying by usage. Always verify EPA ratings for your specific configuration and consider testing in real-world conditions to gauge performance.