How exactly is strong Quicksilver?

so how many can he lift?

First off, questions like this should be asked here:
http://www.killermovies.com/forums/showthread.php?threadid=346614&pagenumber=1

Secondly:

Well realistically he'd have to be a lot stronger than a normal person to survive the kind of acceleration he does and move his limbs so fast. It's generally best not to trust the handbook stats unless you have absolutely nothing else to go on, like actual comic feats.

Originally posted by Endless Mike
Well realistically

His legs are class 10 acc. to handbooks, that's it.

Don't know how much stock can be placed here but found his strength level.

http://marvel.wikia.com/Pietro_Maximoff_%28Earth-616%29