Indeed. I've run a MG bypass for years. I change the roll every 5K miles and add a quart to replace the oil lost. The sump gets changed every 15-20K miles or one year, whichever comes first. Oil analysis was used to arrive at this regime.
I refer you to this well done study:
http://tinyurl.com/363cu
Further, consider the part concerning the effects of make up oil:
http://tinyurl.com/3dd9y6
"More than anything, what this shows is the incredible effect top-up oil has on the longevity of the motor oil. Even with the minute amounts of oil we added over the course of the study, we extended the "age" of the oil by 8,000 miles compared to adding no oil at all. Indeed, the filter change at 12,000 miles refreshed the oil so well that its corrected age actually remained below the 12k sample's corrected age for almost 3,000 miles! It's no wonder extended-use oil change schemes demand frequent filter changes. The top-up that follows the fresh filter is practically a time machine for your oil. Indeed, one is forced to wonder whether an engine with a high-quality PAO synthetic combined with a bypass filtration system and regular filter changes would ever need its oil changed at all."
I refer you to this well done study:
http://tinyurl.com/363cu
Further, consider the part concerning the effects of make up oil:
http://tinyurl.com/3dd9y6
"More than anything, what this shows is the incredible effect top-up oil has on the longevity of the motor oil. Even with the minute amounts of oil we added over the course of the study, we extended the "age" of the oil by 8,000 miles compared to adding no oil at all. Indeed, the filter change at 12,000 miles refreshed the oil so well that its corrected age actually remained below the 12k sample's corrected age for almost 3,000 miles! It's no wonder extended-use oil change schemes demand frequent filter changes. The top-up that follows the fresh filter is practically a time machine for your oil. Indeed, one is forced to wonder whether an engine with a high-quality PAO synthetic combined with a bypass filtration system and regular filter changes would ever need its oil changed at all."