I understand about preventive
I understand about preventive maintenance, but if what you're saying is correct, the factory recommended oil change interval of 10000 miles is not adequate to prevent damage. Why does Toyota not shorten the interval officially, to 5000 or even 3000? To prevent oil consumption, my mechanic recommended switching to 5w20 oil instead of 0w20. Less oil is left on the cylinder walls to burn and we change the oil at 5000. What say you?