Air filter protects engine from dust particles. In India there are 3 seasons. Summer,rain & winter. In summer & winter we experience dust on all types of road. Dust is on express-way,national highway,state highway,city,town & in rural area also. But in rainyseason this dust converts into mud. So is can we run car without airfilter in rainyseason days? More free flow intake air. More free flow intake air means better signal from MAF sensor. So that better signal to ECU for better throttle response & milege also?