A W-fare for ORD-MAN, for example, sounds like it would only get 0.5x miles (based on the following post).
Originally Posted by GoldCircle
business fares x 2.0 c,d,j
full economy fares + the new economy (transatlantic) fares x 1.5 y,s,u,l
economy fares x 1.0 b,k,m
discounted economy fares x 0.5 h,e,q,o,v,w
web only fares x 0.25 t, n
g is a travel trade/staff positioning code and doesn't earn miles; it's recently started making an appearance as a discounted published fare also. Avoid at all costs if you come across it.