Originally Posted By: userfriendly
You are absolutely right DustyRoads.
You are not my target audience, but those who ONLY look at wear metal levels in UOAs, and make conclusions without looking at the bigger picture.
There is a shift point when an engine oil is dropping wear metals out of suspension and into sludge.
There is also a shift point where fuel economy drops below the cost of an oil change, if we are talking economics.
Now go to the other threads in this section and pick out the posts that convey the wrong messages.
The TBN/TAN and viscosity relationship from VOA has changed drastically, but "we think you could extend the ODI XX more miles", etc.
Once again, using said wear metals for confirmation.
Agreed. As you've already mentioned in other posts, there's the need for oil to be in grade for uber cold starts, too. You're making good points for all to consider.