Well the ac recirculate button being on does make a difference. I can vouch for it. But not too much i'd say. Around an extra 20-25ks. Thats about it. But looking at yours even that'd be great. Yes the AAC valve cleaning helped me out a bit as well. i was getting 330ks, no super mods, but after doing these things went upto 360 in summer and 380-390 in winter