recently it seems that my sportage is working harder than usual. I usually do 65MPH on my way to work and my RPMS have been right around 3000rpm. about a 6 moths ago I remember them in the 2500 range. Also I've noticed when I turn the vehicle off what seems to be a dripping noise underneath the truck. I looked extensively without putting it on a lift and saw no signs of oil or anything leaking. A year ago I had the 60,000 mile check up and I just recently changed the oil and filter at 72,000 for the 3rd time since the check up. Is 3000 rpms normal for that speed? and does anyone have an idea what that dripping noise is? I only hope the head gasket isn't going.