Below is my second consecutive UOA of the Ravenol VST 5W40 for my 2018 BMW M550i with the N63 V8 twin turbo engine. I think I'm happy with the results except for the viscosity shearing. I thought their USVO technology would keep the viscosity at bay but obviously it doesn't look like it. Previous sample was taken after 5500 miles of use and there was no shearing, this one is at 7500. So maybe some shearing is expected between 5500-7500 miles. However TAN looked good. My driving was mostly highway with an 800 mile trip in the hot summer, some city driving and some stop and go driving in LA traffic. A few spirited runs as well but not that often.
Ravenol VST 5W40 - 7.5k miles- 2018 BMW M550i xDrive
- Thread starter dkotanto
- Start date
Similar threads
