Hi, I've never seen this before. I got a Rover (I think an i5500) with a chonda OHV engine from the tip. After a good carby clean it started and ran fine but was blowing a browny residue from the exhaust. I shut it off and then I checked the oil (I should have done that first, I know). Anyway, it was a milky pink colour. We have had a lot of rain here lately and I was wondering if water would do this. I don't see how rain would get in though. My experience is that water in oil will send it to a milky chocolate colour. Would ethanol in fuel, if accidentally added to the sump do this? I should flush this out now. Any ideas how best to do this?