Kevin

Doc I have taken test strips. Most cars have had there coolant topped off or replaced due to a hose failure or radiator failure. I had a customers car a few years back that had the green coolant. I used my test strips that I use for my Detroit (green)coolant. It was down 5%...

Doc are you running the green coolant? If you have the pink it's been refilled since delivery.

Nick, all I can tell you >> there is a difference between the two coolants. What>> I don't know. For myself and my customers there isn't enough difference in price NOT to buy the Genuine Porsche made by Zerex coolant.

Kevin

These are the test strips that I use....

http://www.peakauto.com/pdf/specs-Fl...est_strips.pdf

Dock

Yes, it is the green OEM coolant that has been in the car since delivery 10.5 years ago. The water temperature still runs exactly where it has since I bought the car new, even in the very hot temperatures we've had this year in "Hotlanta". I've never needed to top it off.

Kevin

Your car would be a prime "test mule" to use the test strips on.