colortvset posted this referecnce to a book “Synthetic Automotive Engine Oils” (PT-22 SAE ISBN 0-89883-110-5) provides some insight to extended service intervals.
Can any one give me some idea where to purchase this info.
I do have extended drain intervals experience and would share them with any one that needs more info.
Thanks,
Jason Keranen
AZ-Syntheticlubes
email:az-syntheticlubes@direcway.com