I guess I am the anomaly then - I oil lightly every firearm, because oil out here in the desert is a dust magnet. I cleaned, wiped down and lightly oiled all bearing surfaces plus a few drops into operating "systems". Perhaps I should re-oil heavier before next range trip. 
I live in the desert too so I know what you mean. However, when a pistol is new, I'll go heavy with the oil at first, stick it into a sleeve immediately, and not take it out until I get to the range. After the first 500 or so rounds, I go back to normal (light) oil. It's probably unnecessary, but just something that I've gotten into the habit of doing.
The only pistol that I've ever owned where excess oil would cause a problem was my Kimber Solo, but honestly there was about 17 other things that would cause it to malfunction too (including "squeeze trigger"). It's about the right size for throwing at a perp though.