oil filter

I'm coming up on my first fuel/oil filter change (2022 Cummins). I see Geno's Garage has both fuel filters for about $125 or both fuel filters and oil filter for about $142. But, there are lots of available options on eBay for less...like $55 or so (just fuel filters) and $100 or so for all...

I am considering installing the Amsoil kit and was wondering if anyone has had any issues with warranty claims being denied because of it. My dealer says that as long as they install it and maintain the truck it will be covered. We might be moving though and since I paid for the extended...

On some other forum I have seen a lot of discussion on the use of 5w-30 weight oils in our engines, a bunch of stuff about quieting hemi tick, all kinds of stuff about which oil filter is best. What are your guys thoughts on this, which oil is best to use, who makes the best filters?