2018 3500 Highcountry 6.6 L5P 15W40 Duron, next change for winter 5W40 same, M-1 filter.
2011 LML, totally deleted by this time next week, Summer SAE40 Duron, winter can't go lower than XW40 with higher bearing load with delete tune, but used XW30 in the past.
16x645s 20W40 Chevron
2011 LML, totally deleted by this time next week, Summer SAE40 Duron, winter can't go lower than XW40 with higher bearing load with delete tune, but used XW30 in the past.
16x645s 20W40 Chevron