The hemi tick threads got me nervous as long tailed cat in a room full of rocking chairs… I was actually considering doing just exactly this in traffic and / or long stops. Seems crazy, but maybe not.
I know there is not a hard and fast rule and driving conditions differ, but is there any consensus on what constitutes “excessive idle?” I guess it stands to reason that if this issue snuck up on hemi drivers under normal use, then normal traffic congestion and stop light idle is enough to cause it…. Better oil is certainly going in it from now on, but maybe revving is a good idea?
I've read and to my understanding the later GEN III Eagle HEMI~2009 to present, when the HEMI had an minor design change(Multi-Displacement System/eight to four cylinder mode) along with variable valve timing is when the cam/lifter failures appeared.
Being, that the cam sits higher in the block and lowered rpm idle to accommodate "EPA regulated fuel savings mandated by the "tree huggers", isn't getting adequate oil splash to the cam/lifters is less.
However, not everyone experiences this issue and have put over an hundred thousand trouble free miles on their HEMI.
There are many threads/posts here in the RAMforum on this topic, although not everyone agrees.
I've read here in the RAMforum of folks having great success with synthetic oils with higher amounts of molybdenum/ zddp is the ticket to help slow the possibility of the cam/lifter issues along with lesser idle time.
Well, I'm definitely not an expert on this, it's sorta just what I've absorbed from watching videos and reading.
Hammer down, and happy motoring.