Mpg Of Subaru Ascent 2025. The environmental protection agency (epa) estimates the 2025 ascent touring’s fuel economy at 21 mpg in combined driving. Depending on trim level, the 2025 subaru ascent gas mileage is from 22 to 23 miles per gallon combined.

View detailed gas mileage data for the 2025 subaru ascent. Any trim above that will lose 1 mpg in both categories.