well i drive 130 round trip to work everyday and i am getting over 40 on the freeway with my 2012 focus and conbimed 39.1 . I changed the exhaust so it has great sound and opened it up with cold air by useing stock induction but with K&N type filter with a reducing hose from 2.75 to 3.00 leaving to top off of the box and does it move. spruced it up with some pin stripeing on the front grill to give it it’s own look.