IMO a lot of the difference from one oil brand to the next has been negated by the extreme tightening of specifications demanded by highly efficient/tight tolerance engines in the last 20+ years. No longer is there a significant difference from one brand to the next and the secret to a long life engine is still regular changes to get rid of the dirt that has built up. No matter how good the filter is (and the better it is the faster it clogs) there is only so much capacity in that little canister before it is full and bypasses so that it does not starve the oil pump.
I have been a Mobil 1 user for years, but recently did some digging. With only a handful of refiners/bottlers scattered around the country and the private label products getting bottled on the same line as the brand names, most of the difference from one to the next is virtually indistinguishable other than the cost which is due to marketing expense for the big names, so I recently switched to using SuperTech (Walmart house brand). It is bottled in a plant run by Citgo and there are several other major DIY guys on the Honda Odyssey forum that have been running SuperTech for 10+ years. Since I have high mile cars I am using the 5W20 (that is what Acura calls for in my '07) high mileage version and feel completely comfortable. I am still in the habit of oil/filter/rotate every 5K and save $9 or 34% each oil change. IMO Royal Purple, Amsoil, etc., are either good or very good products, but for run of the mill daily drivers that will head to the scrapyard for a reason other than a blown engine 98% of the time it simply does not make sense to run something that costs as much as those do. JMO
2007 MDX Tech Billet Silver
2007 Honda Odyssey EX-L Nav/Res
30+ Years Automotive & Related Industry Experience