You oiled the chain... once?Clean it? Umm...I never took it off road or anything--so it's not like there was alot of build-up.
What i DID do was ride it all-year round, therefore, I saw alot of water use. Regardless, I made sure to oil it. It's frustrating that these chains just don't last.
One thing I do want to note, is the manual calls for gear lube being adequate. All I ever used was teflon based "spray-lubes" that come in a can. Maybe gear oil has a better additive package to penetrate the o-rings and get into the roller better than spray lubes.
If it was oiled regularly there would be zero rust.
R U S T can spell "the end"