Always been a Rotella man, myself. Probably out of brand biggotry more than anything else. It's just so prevelant in my area (midwest).
But I have broadened my horizons, so to speak, over the last several years. Still like Rotella; got gallons of it in the garage. But I've come to learn that for short to moderate OCIs, any quality brand (Delo, Delvac, Rotella, Premium Blue, Tection Extra, etc) will do just fine.
Now I buy the "bargins"; brand names I find on sale with rebates, or inventory close-outs. Same great oils, and my penny-pinching attitude!
Arka's UOA just goes to show a few things.
1) bypass filtration doesn't require synthetic fluids
2) Delvac rocks as much as any other brand
3) CJ-4 doesn't suck as bad as some say, when used with ULSD
4) bypass also doesn't provide a HUGE impact until higher mileage
Point #4 is something I've professed for some time, but few believe me. How much better is this UOA over a similar one with Delvac 1300 and no bypass, posted over at DP? Not really any better. But, as the miles keep stacking up, the advantage is that Arka can run this out for 20k+ miles! That is the true advantage of bypass; fluid longevity!