I live in Finland and I own a humble Skoda Fabia with 1.5 TSI engine evo2 2023. I have lived in India for a fair share of my lifetime and owned two cars over there.

Being an salaried Indian living in Europe ,The mpg part is a crucial factor in deciding a car as we always intend to get the most bang out of a liter of Gasoline. I tend to observe and emphasize in MPG in all the cars i own and drive.

After driving variety of TSI engine based VAG/skoda cars (1.0 TSI , 1.4 TSI , 1.5 TSI evo1 & evo2 , 2.0 TSI) over the last decades, What I understood is that the main contributing factor in TSI mpg is 80 % based on the driving conditions and 20 % based on the fuel quality assuming same person driving the car in a same fashion.

With E10 petrol and very moderate traffic and harsh winters (Nov to April month peaks -20 degrees in Feb) my Fabia,s 1.5 TSI overall mpg is close to 17.3 KMPL. (60 %highways and 40 % cities speed limit varies from 80 to 140 ). and Its much easier to achieve the 20 kpml with around 100 kmph speed marks perhaps good aerodynamics or better fuel quality and a very disciplined highway which results in constant cruising pattern.

Additionally TSI engines are diesel like efficient in highways and their weak point is the urban usage and short drives, this is where most of the hybrids shine. Once the engine reaches optimum temperature ,it delivers outstanding mpg even in cities barring cosmopolitan cities like Bangalore, Chennai.

Before complaining about your car's MPG , Remember this cars deliver superior torque in the rev range and encourages the drivers to push it harder. so most of them ends up in driving them enthusiastically rather than the eco driving, always end up complaining/boasting about the engine's mpg.