if you want to run your syn oil a bit longer than you feel comfortable,
change the oil filter . the oil gets diry as we know, but the superiority of syn oil
allows you to run it more miles. just change the oil filter, which will filter out
the small carbon deposits.
Am I missing something? Don't you have to drain the oil to change the filter? So you're saying you drain the oil, change the filter, and then pour the old oil back in?
No. You do not have to drain the oil to change the filter. When you only change the filter you do lose whatever oil is in the filter, but the filter only holds a few ounces. Just top off the oil tank with new oil afterwards.