Originally Posted By: BobFout
Originally Posted By: Johnny
Probably somewhere around 4.7
That is extremely high for an API 40 wt, more than TDT, DEO etc. The only thing close is Redline and Shaeffer.
For the old Rotella, someone on another forum confirmed with Shell that it had HT/HS of 4.2. Not sure if and how much it's changed with the release of T6.