An interesting side note that I didn't mention earlier about new, rollerized engines.

We just got a new Honda (ya, I know) CRV with 4 cylinder. The manual says to absolutely NOT to change the oil before 5000 miles. It appears, from what I have been able to learn, that Honda is using a very heavily loaded (moly for sure) break in oil, and they don't want the engine seeing regular SM oil for at least 5000 miles. The factory fill is very dark and looks like it already has 5000 miles on it!

We also have a new Chev (ya, I still know) Express 3500 camper van with a 6.0 V8. GM says to not change the oil until the oil monitor tells you to, or at 1 year. The oil in the van is also quite dark compared to SM, but not as dark as the Honda. I even went to the Chev dealer to look at oil in fresh off the truck engines, and it also was dark.

It certainly appears that the OEM engines need (and get) better antiscuff than SM provides during breakin. After that, I think it is anybody's guess.

Anybody got any info on what the analysis of original fill is on the new cars?