Originally Posted by Patman
I'm a fan of an early first oil change, even though it'll probably make no difference in the lifespan of the engine either way. ...
I agree. The few times I bought new, I changed between 600-1000 miles, then ~3000 miles then factory recommended interval.
I only kept one of those vehicles past 100,000 miles and had no issues with it, and would not have if I had left the factory fill in for 7500 miles.
My Scion I changed at 1000 miles, again at 2500, and then 5000, and has been on ~ 5000 miles interval since. Almost 50,000 miles on it, and expect another 100,000.
As for the early UOA, it will give a skewed baseline IMO. I would wait till the 2nd or 3rd change to get a starting baseline.
I personally have no reason to do a UOA. I don't extend my intervals, I don't have any problems (that I know of) and I don't use the same oil so no need for that aspect.
I have done a few in the past, but just no longer feel the need.