so i did a plugs, air filter and oil change for a buddy of mine in his dodge nitro 3.7. i sent him to autozone to get everything. i researched beforehand and saw that it took copper ngk's from the factory. anyways i tell him to get autolite iridiums. first the chick tells him that they come with double platinums from factory and suggested he buy those. where she got that from i dunno, my research even said platinums dont do very good in that particular vehicle.... second i tell him to get mobil 1 5-20.... she tells him that if he changes to synthetic he can never use conventional again and that it "eats" gaskets and for him not to buy that oil. third... i tell him to get anti-seize for the plugs... she then tells him to cover the threads which was correct... but then she tells him to put a lil bit on the electrode itself for "better startups".. then she tells him he needs and ignition coil... yes one coil. hmmmm thats weird cuz its a fukcin V6 and if he indeed needed them, wouldnt he need six? and i think theyre good for 100k miles or better and he only has 60k miles... nevertheless i went back to the store with him and exchanged and returned **** not needed and had a lil talk with the manager. he apologized and said he would have a talk with her. to give ppl information when u have no clue what ur talkin about isnt cool in my book.