3K oil canges are a thing of the past even with a good conventional oil. You are just throwing money away go at least 5k, but hey whatever makes you sleep better.
I drive my car hard so it takes abuse. Sure 5k is fine in your basic Toyota but not in a car that is a daily driver that red lines here in there. Also I short trip daily so even after 3k a decent amount of water gets into the oil. Ill just put it this way. I never seen a motor go due to oil related issues with 3k changes but I have seen them shell or have sludge problems for going the "extra mile"
Better to be safe then sorry
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