Jeff:

I agree that it's a good idea to lubricate both the hinges and rollers on your garage door.

But, I think you missed the mark again by suggesting people use OIL on them. Airborne dust sticks to oil making the grime you see so often on the underside of your car's engine. A better choice would have been DRY GRAPHITE in an aerosol can. You can buy this stuff at any hardware store. Locksmiths also might carry it, but locksmiths prefer to use powdered graphite in a small blow gun because it's less messy. I prefer the aerosol because it delivers more graphite and the graphite gets all over everything inside the lock.

The reason they call it "DRY" graphite is because the propellant in the can evaporates completely, leaving only the graphite behind.

Graphite is a natural lubricant because the carbon atoms in graphite are arranged in a hexagonal pattern in "plates", and those plates slide over each other easily. Airborne dust won't stick to graphite and graphite is unaffected by temperature, so it's lubricating properties are just as good at -40 deg. Celsius as they are at +40 deg. Celsius.

Also, if someone is reading this that doesn't know whether friction is causing problems with their garage door or not, but are concerned that lubricating the garage door may be a messy task with no reward, buy some glycerine at any pharmacy for $3 a bottle. Apply glycerine to your rollers and hinges. Glycerine is in fact a low volatility alcohol, but it behaves very much like a light oil, like WD40 say. If you get a noticable improvement in the operation of your garage door, then wait for the glycerine to evaporate in a few days, and then apply graphite from an aerosol can. If you don't see any difference, don't worry about having added glycerine; it will evaporate completely without leaving any residue.