I dont think the coolant in this car has ever been changed. Now 11 yrs old and 130,000 I think it proably should be changed but what type to use? The dealers records dont show any mention of it being changed and suggest it would not have been. They can't tell me if it is the original type or not. A radiator place is reluctant to tackle the job in case there is a problem with non compatible products. Any ideas ?