HPL stopped the oil loss on a 2014 Accord 2.4 Earthdreams engine that had OCI's based on 15% remaining on the Maintenance Minder. Almost always used Pennzoil Synthetic. Would lose about a quart every 7500 miles (which is very good, by the way). I'm not losing that much oil with the HPL in...at first, there was no change, but, after a few thousand miles...the level has held rock-steady. I suspect there was some cleaning that occurred which slowed/stopped the burning. HPL in a Camry shows no loss, but, that engine didn't lose any over 5000-7500 mile intervals. MPG stayed the same on both cars. About to put Supercar 0w30 in my 300+ HP Mini Countryman...I'll monitor for LSPI, but, expect nothing out of the ordinary, other than I'll feel better about running more than 5000 miles on HPL (which I didn't with other oils).