I found this thread and have the '06 Mega Cab 1500 5.7 Hemi.
Lately, if the truck sits for a day or two, it has a bad lifter-tap (not the tic - have heard it)...
I have been running 5-20 Mobil full syn with either a Mobil or Purolator filter (NEVER Fram).
It takes about 4-5 minutes to warm up enough for the tap to go away and then it is as silent as a mouse.
So, I am at 2750 on my oil change mileage, literally just turned 170,000 (170,019) and it happened again today. Yesterday had a 160 round trip, highway run. Got in it this morning and very loud.... never revved it up, just let it sit, got to almost temp and it slowly went away. Let it run for about 10 mins at idle, took it around the block, let it get to full temp then just put it up on the ramps.
I just drained the oil and it was a bit thin... and I don't do a lot of city miles - hardly any and I haven't pulled a boat or anything in 3 years. I do not have the MDS since it is Mega Cab.
What are you all's thoughts on going to 5-30 from 5-20? Or, do you have other suggestions?
This doesn't happen all the time. Only like 3/4 times in the past 4-5 months.