Simple Green killed my wheel bearings so I have stopped using it. I would still consider using it on a chain. Just be careful with it around the wheels and bearings, sealed though they may be.

Here on Bike Forums we have had many many multiple paged arguments that go on and on and on about lube and chain cleaning. No one will agree. Search. WD40 is only good to remove dirt, IMHO. My next chain lube will be some 3 in 1 oil. I kill chains. I live on top of a big hill, 750 feet, steep too. I climb lots of hills, Petes Mountain, Wisteria, Cemetery Hill, Bald Peak etc. So I push hard and stand up a lot, I'm 175lbs / 6' as well, and I'm not the best at keeping the chain clean. So I get about 1K out of my 10sp chains. Some people do a lot better but I don't think they climb as much, maybe my lube sucks, I dunno.....