Rotella is a really stout oil. Seems to be doing well for your application. I would go 8k without a blink of an eye. I was also experimenting with Rotella in my Equinox and so far so good.
Originally Posted By: LeakySeals
I see no makeup oil, thats good. If you were consuming I would wonder about the long term effects of higher levels of phosp and zinc on the catalyst.
The levels are close to the SL oils .
Interesting point about the cats. For the last 3,000 miles I have had to reset the CEL for a P0431 code: Warm Up Catalyst Efficiency Below Threshold (Bank 2).
I was quoted $900 by an independent shop for replacing the suspect catalytic converter, which is located in the exhaust manifold, so I moved both O2 sensors out of the exhaust stream with a set of adapters from Blox Racing. No new code for the past week.
This vehicle has four cats. Each bank has a pre-cat (Warm Up Catalyst) and a second cat downstream. As long as these converters don't clog and the downstream cats do their job of cleaning the exhaust, I'll leave it as it is.