need to see whether Spark is fuel efficient

need to see whether Spark is fuel efficient…dont compare with swift..compare with Wagon R. But dudes what ever you all may say, Sapark has to stand teh etst of time through the first monsoon in indian driving and road conditions. Especially the Mumbai roads. We will applaud if it can do so. ia m waiting for it to be on road for 6 months..see the situation and then buy