I don't know if anyone has heard a rattle in the rear hatch while driving slowly over concrete expansion joints. I took my car in today and the tech took my car out with the service manager and isolated the rattle. The rattle came from the vibration of rear window brake light . He was able to fix it by disassembling the light and placing some insulation between the metal window frame and the metal holder. If any of you should notice a metal rattle in the rear hold your hand on the light to see if it stops. Once isolated the fix only took about 15 minutes to repair.

Also spoke to him about the use of syntheic oil for the Z. He said the synthetic is fine to use in the Z but is a waste of money unless you use the car for racing. If the car is driven normally and the oil and filter are change every 3000 miles mineral oil is perfectly fine.

 

I haven't noticed any rattles *knocking on wood*, but I did notice that on cold days, the gas struts for the rear hatch make some interesting noises...