here's my 2 pennies!
I have owned a HPDI in the 225 model, which was manufactured in 2004 that I purchased new in the crate in 2006. After just 37 hours on the engine, I lost my #1 cylinder. It was completely rebuilt and after only 16 hours on the engine, I got a call to bring it in. The engines had oil pumps that would not pump enough oil on low/mid-range RPM's. My oil pump was updated, and other than regular service of filters/plugs, it never gave me any hiccup.
I would have no problem buying another one today, especially after what I put that engine through on the 22' Blazer. i didn't abuse it, but it worked it's a$$ off for me for years w/o any other issues. And if I needed to run WOT for an hour boat ride, it seemed to run even better!
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