I'm curious what sort of feedback/test results were seeing from converts to HPL engine oil after say a "long term", i.e. 5-10 OCIs. I'm about 500 miles into my first full sump of HPL PPCO 5W30 after the ubiquitous previous short run OCI of M1 + 1qt of HPL Engine Cleaner as a prep. I do plan on doing my very first oi oil analysis send off after I drain and refill in a few months but am also curious what others of you that are several OCIs in on a full HPL changeover are seeing/experiencing/testing.