By Jim Fitch
Practicing Oil Analysis Magazine
Rule No. 1: Don’t mix incompatible lubricants.
Rule No. 2: When in doubt, assume that two lubricants, when mixed, will be incompatible and will exhibit adverse side effects.
Many think the question of lubricant compatibility is a trivial matter, and therefore have not given it serious thought. Sadly, I could fill every page in this issue of this website with recent case histories that underscore the importance of the two rules mentioned above.