Any one find a change in the brake pedal feel between winter & summer, so the cold & the not quite so cold? Is there to be expected any difference in performace of types of brake fluid? Does it go off? I know its down to be changed every 2/3 years. Well mine likes the warm, a bit of a unsmooth feel in the cold/wet. This is nothing to be with the brake pads, as its the feel with the car started but not moving. So in the heat of this weekend , applying my foot to the brake pedal its a smooth even movment. But in the colder,wetter days earlier in the week the first pressure on the pedal was jumpy & creaky, this is with the car standing no brake pad applying on discs I am thinking air getting in the system? or perhaps the fluid better when thinner. What is peoples thought on upgrading the brake lines & changing the fluid?