i have used 10w-30, 10w-40, 10w-50, 5w-30 and 5w-40 as well as the synthetic that i use now, which is the wal-mart generic version of Mobil One. all of the conventionals gave me chatter when running but not moving on hot days. the 5w-30 probably did it least, then the 10w-40, but when i switched to the mid-octane fuel, only the 10w-30 would give the chatter. this post suck grammatically, i know, i'm half awake and it's monday, well, sorta, and i'm at work and don't want to be. anyway, just get some generic full synthetic oil, run it for 2 or 3 changes, run mid-octane fuel, 88 or 89, whatever it is in your state, then try to get it to chatter. just sit in traffic at about 4 in the afternoon, move slowly forward, etc.

dave <img border="0" alt="[Shiner]" title="" src="graemlins/shiner.gif" />