From what I understand this was written to target the failures of the EVO FP Black and similar turbos (standard bearing) as they were failing quickly for some people due to poor oiling. I also think this helps explain why so many end up with bearing and oil pump failures. Now we can add Mobil1 to the list of DSM oiling issues:
- oil trapped in the head (esp. 6 bolt heads)
- pickups sucking air (high G's, oil is all in the head)
- extremely low idle oil pressure in some DSMs
- stuck oil squirters
- oil just isn't providing enough protection for the severe conditions we subject it to (Mobil1 and similar on-road synthetic oils)
In regards to manufacturers still recommending Mobil1, first Mobil1 tends to be a bit thinner than competitors helping fuel economy numbers, and secondly I'll bet the bearing area in any current production car takes into account the lesser properties of the current generation of catalytic converter safe (and fuel efficiency targeted) engine oils. I don't think there is any volume manufacturer or synthetic oil that would pass muster for a vehicle manufacturer to use (catalytic converter compatibility, fuel economy, consistency, availability, and high volume production) that provides appreciably better protection than Mobil1.
For us, we can switch to a high zinc and phosphorous combination oil, as we either don't care about cat longevity and/or we care more about engine protection. I wonder how sludge build up is with these racing oils as they have far less detergent additives. I have a feeling I would be most happy with a oil a little more street friendly, and replace my oil for track duty.
