Thanks for the great advice ya'll! I will inspect and investigate the squeak in the back further and maybe apply some lubricant spray if I can verify it is the leaf springs.

As far as the oil, I am wondering what those jokers were putting in over there at the dealership when I enjoyed the free oil changes for a few years. I wonder if I call and ask them, if they would actually tell me the truth. Makes me wonder.

One more thing - are all 16 plugs copper on the 07' 5.7 HEMI? Aren't there supposed to be half iridium and half copper?

 

No, only the more recent 4.7s get two different plugs, changed at two different intervals. The Hemi is all the same plug (I used NGK 5306s in both of mine), changed at the same time.