The fuel consumption for Chevy is same as Santro. The body and comfort is much better in Chevy. Safety is the biggest advantage in Chevy but you give it importance only if you have seen a major accident..!!!
I recently completed a number of trips on Chevy (7000 km). The car had 2 adults, 2 children and luggage. here is mileage I got:
Lahore City (without luggage): 14+ km/l
Motorway: 17+ km/l (speed b/w 110 - 120 km/hr)
Taxila & Islamabad: 18+ km/l (Speed b/w 80 - 100 normally)
GT road: 18+ km/l (Speed b/w 90 - 110 km/hr)
In Lahore, I always use TOTAL petrol station in Allam Iqbal Town and it certainly gives good mileage. TOTAL petrol station in Gulberg (near Hussain Chowk) was the worst giving less than 10 km/l while permring the similar daily duties..!!!
Personally I did not like the car in the beginning but after som long trips, I think its worth spending money on Chevy rather than Santro..!!! My experience with Santro with similar milage was extremely bad on GT road..!!!
Chevy milage is ONLY 11+ km/l in Lahore city with AC..!!!
I think its certainly worth spending money on Chevy..!!!