Just did my first self service oil and UDT fluid change and it was a piece of cake. My question for those that have done this next to the oil drain plug looking forward just to the right is another drain plug that I removed and nothing came out. Im not sure what it's for. Anyone have any ideas? As a update on mine I have 200 hrs zero problems except the original rattle...Its still there but only notice it at idle. Besides that when i changed the UDT fluid I picked up noticible speed and power climbing hills.