heres the story:,,at not frequent of intervals,,when i shut the car off some coolant would come out the res bottle....i changed the thermostat and coolant....i added 40 coolant/60 water and half bottle of water wetter.........when i emptied it out i got about 6.5 qts...(maybe a bit much ...i kept adding coolant when it leaked) anyway,,,,when i filled it up i could only get about 5 qts +the water wetter not the spec 6.3.......ran through 3 fan cycles and everthing looked ok,,even though down about a qt.....checked it everytime i drove it, and looked ok,temp fine....now,(2 weeks after the change) some coolant came out again,dont know what to try. any help would be appriciated........(no oil residue in the old coolant)...98 2.5 RS thank you