Terry or Blackstone Labs Quetion: Royal Purple API 10W30 Baseline TBN??

[outrun]

Thanks- Anyone else, if your out to indict RP for political reasons please initiate another message string

 

[YZF150]

Don't know about the 10w, but I asked RP about the 5w and their tech advisor reported 9, according to ASTM D-4739 Total Base Number By potentiometric titration.

 

[TooSlick]

Outrun, The data I've seen, using ASTM D2896, showed a TBN of approx 11.0, so that would be consistent with a TBN of 9.0 using ASTM D4739. TS

 

[Patman]

Here is a VOA of 10w30 RP, done by Blackstone using their old method: http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=11;t=000110 TBN of 9.5