Hello All! I had ran M1 0w40 over the winter months with daily cold starts at temperatures below 20F. I am fairly happy with the results given the conditions. My commute is only 7 miles which only adds to the severity.
The only thing I can't seem to do is to shake off those higher Copper numbers. Copper oil cooler is the only explanation I've managed to find online. But I find it hard to believe. I mean, oil rushes through the cooler and somehow erodes Copper, while Iron parts rubbing against each other produce less wear.
Does anyone have any idea as to the source of the Copper besides the oil cooler? Any suggestion is much appreciated.
The only thing I can't seem to do is to shake off those higher Copper numbers. Copper oil cooler is the only explanation I've managed to find online. But I find it hard to believe. I mean, oil rushes through the cooler and somehow erodes Copper, while Iron parts rubbing against each other produce less wear.
Does anyone have any idea as to the source of the Copper besides the oil cooler? Any suggestion is much appreciated.