Aren't the oil wars fun?
Here's my take on it.
1. Changing oil before the manufacturer's recommended mileage or time limit is a waste of time and money. I have never seen an iota of scientific evidence that indicates that a 3000 mile change helps a vehicle that the manufacturer says needs changing every 6000 miles. I have noticed that ALL the oil companies recommend 3000 miles, for cars and bikes, in spite of the clear recommendations of the car and bike manufacturers. So if we want to further line the pockets of the oil companies, we are certainly entitled to do it. Which brings me to 2:
2. Even if it makes no economic or scientific sense to change oil early, but it gives the owner a sense of security or peace of mind, DO IT. In the whole scheme of things it might be just one of the cheapest ways to make us feel better.
I use dino oil in the little Honda and change it every 3000, as recommended. I use semi-syn in the Virago and the Tbird and change them every 5000 miles. Ditto the two cars. Why? It is easy for me to remember that I change the oil in all my vehicles every 5000 miles: 5, 10, 15, 20, 25 etc. That way I don't have to try to remember (except for the Honda) when to change the oil. I'm coming up on 75000 on the Grand Marguis, so a change is coming. I'm just over 13000 on the Tbird, so a change is coming in a month or so, etc.
One other thing: I do not winterize my bikes but ride them at least 30 miles every two weeks all winter long. If I did winterize the bikes I would change the oil before putting them into hibernation, regardless of the miles on the oil that is in them at the time of winterizing. I have no evidence that this is a better thing to do, but to me it makes sense not to let them sit idle in a cold garage with dirty contaminated oil in them.
Take care,
Monte