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It was closer to 250,000 K. the issue was that I had the Hemi-tick for a while. I think there was a fault in the camshaft, or possibly the lifters. If you hear the the "tick" - it's either the manifold (which I had assumed it was) or the camshaft and lifters colliding. Eventually the camshaft wins.
In my case, I always ran synthetic. Unfortunately, I did let it idle. And I had the hemi-tick at some point. Initially just on startup. It got worse, but always went away after about 3-4 minutes. Never really thought about it too much, and I assumed it was something simpler, like the manifold exhaust... :/I have a 2015 - 5.7 hemi 316,786 kms running synthetic oil, no issues. Change trans oil every 2 years and diffs every 3 years. You can’t let hemi’s idle. The OEM oil pump at idle doesn’t deliver the volume to the heads, lifters. Then you get Hemi tick, cylinder failure. I installed a MELLING HV oil pump. Either install a MELLING HV oil pump or Hell Cat HV oil pump. A company product that will stand behind it. Not just any HV pump. ( if you want to spend the coin ). Then be happy with piece of mind
