I'm curious to see if that'* solved your problem. GF'* intrepid does the same thing occasionally in all weather, but it'* not as defined of a sound, and unless you're a perfectionist like I, you wouldn't notice it lol. If so, I THINK I may have thrown a Fram ToughGuard on there. Time to go mopar... maybe lol.
Some bad news... Since it'* gotten cold out again today (below 20*) the noise has returned. :( I'm pretty bummed out about it.
I'm thinking it may be a good idea to send the oil in to get tested. Where'* that company that does this? I can't remember. Also, the oil smells a little 'off.' Almost like there is gas in it or something.