Okay, time to chime in.
First and foremost, many thanks to everyone who contributed to this thread, especially Burla. I have learned a lot and I appreciate everybody's time spent to share their experiences and knowledge. There is obviously a lot of well thought out research based on fact found here. Good job all!
I bought my first RAM in early 2017 (3500 w/6.4, custom order) after living for 20 years with a Ford F250 with the 7.3 diesel engine. Despite what some members on this forum might think/say about Fords, this was an amazing truck that I couldn't have been happier with. But it was time to replace it so I started looking at the only three manufactures that make 1 ton trucks (okay, really only two for me...). The Fords had the new aluminum bodies that year and I will not buy a first year ANYTHING major so I started looking seriously at a RAM. For several reasons I went with the RAM and initially thought that I would go with the Cummins engine because I was so happy with my prior experience with diesels. But I don't tow a lot of weight (at most around 1,500#'s) but do carry a 3,500# camper 98% of the time. So I was more interested in payload capacity versus towing ability, and since the gasser gave me about 400#'s more payload over the Cummins, I went with the 6.4 Hemi.
I had never heard of the "Hemi tick" prior to buying this truck, but I am pretty sure that my engine has the tick- currently at around 33,000 miles. I don't have anything to compare it to, but there is some pretty significant "ticking" for about a minute on cold starts especially. When I purchased the truck, one of the "ad ons" that I got was lifetime oil changes (up to five per year I think it is). Seemed like a good deal at the time, and still at this point I have no regrets- I have had 7 oil changes so far. I drive the truck hard (I don't haul air in the bed around town) and have the oil changed at around 4-5,000 miles. Of course with the lifetime changes the dealer uses the FCA spec oil, PUP 0W-40.
Based on the reading that i have done on this forum, and specifically this thread, I will be adding Lubegard Biotech to the engine as soon as my recently placed order arrives. I have known for decades that Moly is a proven fiction modifier and as long as it stays suspended in the oil, rather than settling out, I feel that it has the ability to significantly reduce friction and wear between metal/metal.
So at this time I plan on continuing the oil changes with PUP, rather than walking away from my purchase, and adding the Lubegard. I am looking forward to hearing a reduction, if not the elimination of, the tick that I am hearing......
Thanks again everyone- MUCH appreciated!
Pete