I have been doing the same as you minus going to the dealer...I have 140,000 on my 2013 right now and do 7,500 mile oil/filter changes...I typically add 2 or 3 quarts within the 7,500 miles when the light pops (1 quart each time the light pops on)...I hate carrying 3 extra quarts of oil in my trunk all the time...at the rate it’s consuming oil I wonder why I even bother changing the oil and just swap out the filter every 7,500 miles and just keep adding oil each time the light pops on
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