when i used our car for work it sat there for 8--12 hrs doing nothing, now when i bike to work its on the move all day on some kind of "must be done" activity by my family, even if i wanted to go back to driving to work i dont think they,d let me, but they still poke fun at me on my bike it used to cost $20 a f/night in gas now its $60 !!! let alone the wear & tear!! but they,r happy. if they,r happy im happy anything for i quite life. so the short answer is no i dont save any $$ bikeing to work!!!