How lovely is this sound… no valve clatter and 29 degrees. Can’t do this with oil alone. M1 0w-40. Treated my engine with CeraTec from 1k - 5k miles, current fill is only M1. I treat every 15k miles.
Source: https://youtu.be/tkaj9jqa0Xo?si=ZkvUpy_v84i9fYPu