800 miles in with my first OCI of 5W30 VRP in a Hyundai 2.4L DI engine . This is by no means a refined engine - but I have to say that VRP is the quietest oil I have ever used in this engine (even surpassing M1 0W30 ESP) . Conversely , I believe Glenda W. reported that at the 2K to 3K mile mark his engine became more noisey with his fill of VRP , so I will monitor for any increased engine noise as I get later into my 3.75K to 4K mile OCI using VRP. Perhaps not as important as cleaning ability or wear protection but I do favor an oil that allows my engine to run more quieter and so far VRP gets an A+ .