How often do you change your blade?

Every three shaves, regardless of blade or razor.

 

3 for Astra SP
Gillette Silver Blues 4 or 5

 

for my every day blades, Astra SP and Ladas, 3 three pass shaves. Personna 74*'s I get 20.
Blades are cheap and as others have said, comfort over being frugal....even at 3 shaves per blade I only spend 1 buck a month on blades....

 

DE blades are three and done.
Injector blades go ten shaves or so.

 

After reading some of the posts, not so worried I only get a couple of shaves out of my Feathers!
I started feeling a little tugging after two shaves.
Like the man above said, one of the great things about DE shaving is the comfort.