2020 6.2L: misfires, lifter issues and engine replacement

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If it helps, the 2020 owner's manual states to change the filter when changing the oil (at least once a year).

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ok, so everyone shows up to tell me i'm an idiot for not changing the filter often enough. i will be changing the oil filter with the oil from now on. my wife put a lot of miles on this car, so the oil filter has been changed at least once a year, albeit not at every oil change.

what about what i actually posted about - the 14k quote for replacing the engine? i'm legit shocked that the solution to the first clear sign of a problem is to replace the entire engine, rather than replacing some components, e.g. lifters.
 
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after having a look on youtube, i found a video that i think is pretty informative in the context of my current problem.

if a lifter fails or gets stuck, it can damage the corresponding lobe on the camshaft, which requires replacing the camshaft. the video works out the cost of the replacement parts and the labor required, as quoted by a dealership, as roughly 2k in parts and 5k in labor (30 hrs). i also see that it is common for dealerships to advise full engine replacement, presumably to avoid customers being angry that a partial fix did not work and to maximize profit for their shop.

the video is only 1 year old, and the comments are rich with content from people who have had the same problem. i see several accounts of similar quotes to what i got to replace the engine, 12-14k.
 

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