Quote Originally Posted by mark_t View Post
Hi guys,

Question

Has anyone tried testing for acidity/ph their engine oil to find out the maximum usage of their engine oil?
Shell used to offer that before... don't know if they are still offering that service for free.

MBT, Glennster & me was able to do the initial review for this service a few years back. AFAIR - MBT has an article here somewhere regarding this.