I just bought a Spark LT and using it for just 1 1/2 month. Bsically, the reason I bought a small car is simply for fuel economy. I choose Spark among other brand because of its design, its safety, its power amenities, its price and most of all its supposed fuel economy.
I dont have any comment on the comfort and reliabilty, I already expect it due to its size and price. But what im really particular with is the fuel consumption.
The Spark has a 1200 engine, it is manual transmission and a full tank of 35 liters of gas( 5 liters is the reserve). I expect that it will go for 12 to 14 kms / liter. The mileage of the car right now is 1442 km, and I already refill it for 5 times with 30 liters of full tank per refill. If you do the month, its fuel consumption is 9.5 km / liter. This is good if you have a 1600 or 1800 car engine, but if you have a 1200 car engine, this is not economical.