Three weeks ago I had my Civic's struts replaced. They did an alignment alongisde that. Today, I bought new tires at a different shop as mine were getting worn badly. After having them installed the mechanic said I needed an alignment.
Here's the output from the alignment machine:
Driver Front: 5/32in inside
Passenger Front: 1/8in inside
Driver Rear: 5/32in inside
Passenger Rear: 1/32 outside
Insider refers to front portion of tire pointing inward, outside refers to outward pointing.
Is that much to worry about? I'm shocked it would "need" this again and I feel that they were just trying to "sell" me the new product.