:: 1. turn on the AC in your car and gas consumption will increase :: with 1 liter (more or less) every 100km (assuming a medium sized engine :: 2L/85kW;average alternator) And yet strangely, my Peugeot both the 308 and the current 207 appear to=20 use more diesel and feel lumpy if I switch the air conditioning off (not=20 advisable with current temperatures). (average is 5.6lt/100klm which in=20 proper measurement is 50 odd milish to the gallon if my maths are OK, with= =20 AC off it lacks oomph and the klms per lt rise to 5.9lt). I'm pretty sure the engine management unit is designed, as is the=20 dimensions of the battery and alternator, to run most efficiently with the= =20 AC on rather than off, the somewhat useless user manual even states the car= =20 is designed to run the AC at all times. Mind you the annoying economy mode witch switches the radio off after 30=20 minutes if the engine isn't running is most annoying! Colin -- cdb, colin@btech-online.co.uk on 28/01/2011 =20 Web presence: www.btech-online.co.uk =20 =20 Hosted by: www.justhost.com.au =20 =20 =20 =20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .