Statistical Process Quality Engineer, Family, Fishing, Hunting, Camping, Anything motivated by internal combustion! 25 years LEO retired.
The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money