Ok, I know all about the exhaust pinging sounds that my dealer has yet to address (May 06 Caliber), but I have this one sound that is driving my nuts. After I turn off the car I hear a soft beep and then tick, tick, tick sound that appear to be coming from the front passenger side. I noticed this sound during the late winter/spring, we had a real cold snap in Feb/March. I had the oil changed during that time and the mechanic failed to read the 5W-20 in large letters on the oil cap and placed 10W-30 (I use synthic oil) instead unknown to me. So, I put about 3,000 miles with this oil. When I took the car to the dealer, they all think this is from the 10W-30 oil, but most folks I talk to don't think so. I had two oil changes with 5W-20 and the noise is still there. Overall, no other problems, I'm getting 30+ mpg (2.0, CVT) and running well. Has anyone else heard the beep and three-tick sound? Thanks.