People might say this is crazy, but when i build car engines from scratch, I run a non detergent sae 30 oil, and run the engine at idle for about 20 minutes, and then go put about 50-60 miles on it. After that I drain it out and refill with transmission ATF. Run for about 15-20 minutes till it gets hot, then drain it out and fill with the Oil of your choosing.
Why you ask?
The SAE 30 ND is a rough oil and seats rings very well in a short amount of time. It works in bearings and rotating assemblies very efficiently without having to run crazy miles on it.
The transmission fluid trick is an old one. I'm sure some of the older guys are nodding about now. The fluid is very thin, and gets hot quick. This is why it doesn't stay in the bike for a long time. Because it's thinner then oil, it gets in places where oil doesn't and loosens any last little bit of debris. When you drain the ATF, it's usually so hot and thin, that you get about 99% of it out just from the drain plug. You can run the engine for about 5 seconds or so and you will clear out anything left in the oil pump if your concerned.
Once the fluids are all out, replace the filter with one of your choosing, hopefully it's not a Fram. Fill with high grade conventional oil or start your synthetics as you see fit.
Do not bring your bike home and drain out the factory oil and fill it with synthetic right away. The full synthetic oils are so effective that it actually impedes the break in of the engine parts if using from the get go.
Now some history on my reasons. We took 2 brand new Subaru STI's, back a few years ago, and did this sequence on 1 of them, and on the other went straight to full synthetic.
After 2 days of driving and putting miles on them both, we ran a dyno test, and got 14.7 hp more on the one we broke in. Now, that's not that much in a 300hp car. Perhaps coincidence? We thought it might be, so we drained the other car, and did the same thing. After a day or 2 of driving it after the new break in, the car made 12.5 hp more then it did 2 days previous.
I'd be happy if my bike got 2hp more. That's 2hp I didn't have
