saved my computer/GPU from death

The other day I decided to do a little house cleaning in my computer. My CPU temps were getting rather high and my fan speeds were starting to slow so I Took the cover off and blew out and sucked out all the dust. I also put a small drop of light-weight oil on the fan motor. I put it back together and turned it on. Fan speed was back to where it should be and the CPU temp was good...however, I notice my graphic card (Gforce 8500GT) temp shooting up past 105