Hoping one of the talented forum members can tell me if if there is a way to determine what type of brake fluid is in the reservoir? The previous owner of my '69 TC2000 told me the vehicle takes Dot 4 or Dot 5 and I added Dot 5 thinking it was a higher number so must be better! Come to find out they are incompatible and can do damage if mixed. Would you necessarily know by brake performance if any damage had been done? What to do know besides find someone capable to take over the car? Thanks for any advice offered.