it just puts a little less stress on the engine and shit, allows it to spin easier..
since u would have a tight engine, your clearances would be right, so the oil wouldn't seep through and burn off...I could run 0-30 without burning any oil, but meh, its abit too thin lol, with 10-30, it runs good.
How many km you done on it now ? Have you noticed the difference in power as it loosened up, the way the powerband opens up is weird lol, it just starts to pull harder and harder everytime you give it a squirt, then it just stops at one.