I am an old foggy & have a hard time with the long oil / filter change cycles . What does your owner's manual require ?
A few things I suggest you think about .
The oil filter traps some of the contaminants . But some are in suspension in the oil . Plus , if you push it too far & the filter starts to clog up , you can reach a point where the oil system starts to by pass the filter ( on many / most cars ) . This means some / all the oil is not being filtered .
Now , when you change the oil / filter , you get a fresh new filter , ready to do its job . And when you drain the old oil , it is a little bit like flushing the toilet . You get rid of the contaminants that are held in suspension .
You are also refreshing the additives the oil also contains .
Next thing is coast per mile . Set up a simple spreadsheet , calculating the cost per mile if you change oil every 5,000 , 10,000 and 15,000 miles . Also , calculate cost per year .
Now compare the cost per mile for the combined total of insurance , inspections , registration , tires , fuel , other fluids , hoses , windshield wiper blades , car wash , belts , other maintenance and depreciation .
I will bet the cost per mile for oil / filter changes is pretty small compared to the other cost of ownership , per mile .
I personally think the cost of oil / filter change turns out to be pretty cheap insurance .
BUT , if you insist on the long oil change interval , at least change the filter a couple of times along the way .
This is my opinion . To those that disagree , , have mercy on me . I am just an old fat redneck stuck in the past .
God bless
Wyr