While some credit can assumed to be because of the the Elite Catch Can installation, I also run the Trifecta Advantage Tune along with top tier mid grade fuel, quality Mobil 1 extended oil and have never missed a 5K oil change. All of these might also be a contributing factor. And 90% of those 125K miles is all open interstate 70 - 80 MPH up & down mountains (Hills actually). The catch can is pretty full at 2,500 miles and is emptied. In the winter months oil drained from the catch can is nasty white due to cold air causing water to condense in the can while nothing bad is seen during warmer months. I was horrified 1st time I drained it during the winter.