So a customer with a 2001 Accord was in my shop the other day getting a coolant leak checked. My tech found a leaking heater hose. He noticed the antifreeze in the reservoir was a blue color, the exact color of the windshield washer fluid we use.
I asked the customer where he had his car serviced last. He said the dealer. I told him they must have accidently added washer fluid to his reservoir and the system would have to be flushed out and new antifreeze installed after the hose was replaced. He said okay.
After the job was done, but before I billed the customer out, I decided to call Honda to see if they had changed the color of their anitfreeze. Guess what? They changed the color of their antifreeze!
Needless to say, I didn't charge him for the radiator flush.