Got this one the odo on the way to office today. Forgot to post about the filter. Opened up the airfilter box to see what is the status of the K&N air filter after 5K kms. The filtering seems to be quite good as this is a stock replacement filter. Ran the fingers around the intake manifold entry, did not find any dust or soot sort of thing, so believe, the K&N is doing a decent job. But air entry to the airfilter box was dirty and the bottom of the K&N airfilter seems clogged too.