I'm just wondering how many Gen2 owners are going over the 5000 mile recommended OCI? In Australia the recommended OCI is 10000 km (which is approx 6200 miles) and every time I drain the oil it always looks in very good condition. I really think the prius is pretty easy on oil compared with other cars I've owned. Maybe it's the way it uses the electric motor and goes very easy on the ICE at start-up. Maybe it's the fact that the ICE doesn't even run for all the miles logged (I mean for example if you drive a lot around town then the ICE might be off for 30% of the distance travelled). Anyway I'm thinking of going 12000 km (about 7500 miles) on the next oil change. Just wondering if anyone else is doing similar.