Best explanation I've seen so far for Hemi cam/lifter failures

turbofreek said

i think its accelerated wear at idle. add on vescocity breakdown from the very very light weight oil used and extended life cycles people puy it through isnt helping. lots of 5k and even 10k oil chage intervels being ignored. leads to premature failures.

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That makes sense. I've never been a big believer in the extended oil changes for modern cars, I do my mom's 2014 Chrysler 300 V-6 every 5k miles but even that feels like it's pushing it just a tad. I always use full synthetic in her car for that reason.

Almost makes me want to get a good-quality low-mileage or stock rebuilt 5.7, fill the sump with ATF (doesn't lubricate as well as motor oil) and start it and let it idle for hours on end. Then maybe after 100 hours or so if nothing has failed yet pull apart the valvetrain and inspect the cam and lifters...