2017 F150 3.5 Ecoboost 6100 miles on 10W30 Castrol Magnatec 21,000 miles on truck, oil monitor was 39 % left with 630 total hrs and 99 idle hours with only a little towing on this oil. Went longer on this oil change due to a 1800 mile road trip. To recap, 1st is factory, 2nd is dealer bulk, 3rd...