Miles per pound (mpp) ⓘ Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs. SEAT Leon review 2 Engines, performance and drive 3 MPG, CO2 and running costs 4 Interior, design and technology 5 Practicality, comfort and boot space 6 Reliability and safety 28 Overall Auto 1 Verdict 2 Engines, performance and drive 3 MPG, CO2 and running costs 4 Interior, design and technology 5 Practicality, comfort and boot space 6 Reliability and safety 28 Overall Auto Express What is the average MPG (fuel economy) of a Seat Leon ? Seat Leon average fuel consumption is 52.7 MPG or 5.7 litres/100km and average CO2 output is 134.6 g/km based on 697 models. CO2 (carbon dioxide), mileage, fuel economy and other emissions data for Seat Leon cars. All Years. Seat Leon MPG 2000. 0j1yM64.

seat leon miles per gallon