In the past I always changed out the factory fill oil of my vehicles at 500, 2500 and 5000 where I would begin OCI of 5000 miles. My new Honda recommends leaving the factory fill until the OLM tells me to change it. Dealer said 5000 and bring it in. What do all of you think about this? I worked at a Honda motorcycle dealership and the first oil change at that time was 600 miles and that is why I changed out the factory fill at 500 miles in my cars. Are the new factory fill oil different and need to stay in for a reason?