our 2018 Compass is still consuming 1 qt of oil every 2,500 miles (~ 6months). we only put about 6,000 miles a year on it and after 2 years have 13,300 on the OD. the first oil report had a TBN of 3.5 using Pennzoil Platinum 0w-20. my thoughts are to top off at 6 months and then 6 months later change filter and top off again. setting the money argument aside to just do the OCI, what conditions would degrade the oil enough to warrant yearly oil changes in a new car that consumes oil ?