Break in oil till the rings seat. I will keep the same oil in during the break in but change the filter 2 times, once after the first set of heat cycles...about 1.5 hours. Again after 200 miles or so. The break in oil is actually prompting all the internal parts to wear in, making them fit better and removing any high places in the bearing surfaces and well as helping the rings and cylinder bore wear into a better fit. This is putting micro bits of metal in the oil so a new filter makes sense, but the oil does not break down. The goal is to get the rings to seat and have as much contact as possible which will make them seal better but more importantly creating a better thermal path to get heat out of the pistons and into the cylinder wall where it can be dissipated into the coolant.
2006 Elise with BOE 400 supercharger and some aero mods, CRF floating oversized rotors, MCS single adjust coil overs, CRF exhaust, CRF sway bar w/adjustable link, mono-ball pivots, machined steer arms, baffled oil pan, CRF titanium toe link brace, hardened motor mounts, Ethos wheels w/Yoko slicks