Hi bro
5 years back i had a 2004 swift & it did only 8kms per ltr.then i bought a 2004 Chevrolet cruize & it did 13 km per ltr.in that time one of my friend(2002 swift owner) told me that to use a some thing called a "nano fuel server"(i cant remember the 100% correct name)its cost only 2500/= ,& now his swift is good in fuel & hes fully satisfy of that product..