Historically, Total Base Number (TBN) has been a key indicator of remaining useful oil life in heavy duty engine oils. As additive chemistry has shifted, standard used oil TBN testing protocol doesn’t provide the insight that it once did.
Historically, Total Base Number (TBN) has been a key indicator of remaining useful oil life in heavy duty engine oils. As additive chemistry has shifted, standard used oil TBN testing protocol doesn’t provide the insight that it once did.