A/C blower motor question..

Years ago I had a clothes dryer that had a squeaking blower motor bushing which was an oilite bushing. I was told by repair shops to just reoil it with turbine oil. When I went to buy turbine oil I saw that it was just this oil that seemed to be about 20w motor oil. So I thought that was a bad recommendation and put heavy grease on the bushing instead. Well this worked for about 4 or 5 cycles and the bushing started squealing again. So I tried STP oil instead and, again, it lasted. about 4-5 cycles before It would start squealing again. So, out of desperation I finally tried the turbine oil almost knowing it was going to fail. But it lasted for years until I sold the old dryer and bought a new one. I was told that turbine oil can operate at temperatures higher than regular lubricants. Must be true!