IMO, it all depends on the vehicle, and some driving style factored in. Our 2017 Ram Cummins - very easy in oil, I’ll go 15,000 miles even with plenty of winter idling. Our 2010 Tiguan, 5-6k miles tops, TFSI is harder on oil and only holds 4.4l or so. 2026 Volvo XC40 - yet to be determined but...