Garage door maintenance?

[Keigotw]

I want to keep my garage door in good shape.
Is there a grease made specific for garage doors? (where to buy them?)
or using WD40 is good enough?

thanks

[Pete_Coach]

Like most products, the manufacturer recommends certain grease and lubricants. Check with your door manufacturer for what they suggest. I use a white lithium grease (spray) for any part that needs lubrication and nothing in the track. I have polyurethane wheels and don't want anything on the rolling surface.
I have a torsion spring and find that a regular application of this grease cuts down on the noise the spring makes as it twists.