I assume that Jon is talking about the AYC fluid (Active Yaw Control) which needs to be changed at 4,500 miles and in order to completely drain the system needs to be carried out with the MUTII tester that Ralliart approved garages have. I'm not sure how other garages get around the problem of the MUT II but I'm sure that there are ways.
I'd go to someone like Steve Hill or Dragon as opposed to a Mitsi dealer... cheaper, more knowledgable and don't smokescreen you from teh car.. you can sit and eat toast with teh mechanic whilst he does the work. Well worth the journey... don't let location narrow your choices - GET YOUR CAR LOOKED AFTER PROPERLY by people who know these things inside out.
Kingswood mitsi tried to shaft me by making up a load of boolx about my car needing a new rear lower arm... ****** Bandits !
The Mutt is used to activate the hydraulic pump if the AYC activation fluid is replaced, which is automatic transmission fluid the reservior is in the boot R/H side, to bleed the system. If air is present pump degradation can occur. An alternative to the Mutt would be a power supply to the pump, direction control valve and proportioning valve to bleed both sides of the system. The system does not have to be bled if a simple drop and refill is carried out of the AYC Diff, using genuine AYC fluid. This is the fluid that has to be changed to stop premature wear of the AYC clutch plates. Although I presume that if the fault is no longer programmed in the EVO 6's AYC ECU the fluid may not have to be changed at such short intervals. As it is such a quick and easy job I will continue with the shorter period for safety!
Don't think of servicing as one of the necessary chores (although it is!). Why not book the day off work, have a pleasant drive in the VI up the motorway, and go see the boys at Ralliart UK in Dudley, West Midlands.
Can't get better than them servicing your pride and joy as far as I'm concerned. Spend the time checking out the cars in the showroom, chat with the boys there and enjoy some sarnies, mags and playstation in the waiting area, you could even do some shopping down the road in the Merry Hill Centre, make a day of it I say!