Mobil 1 every 5k and a new filter every 10k. I do it in the garage, both cars use the same filter. Engines are spotlessly clean and I only fill to the middle of the dipstick. Neither car looses any oil between changes and no leaks or I would see a spot on the garage floor.
I save the used oil and take it to my old shop where they burn it for heat in the winter.
Regards
Mech
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