Okay, I have a mystery coolant leak somewhere. It has been there pretty much sinceI bought my Disco. I had a buddy pressure check my system before I left FL. for AZ. (he was a mechanic), and it held pressure with no loss. But it is going somewhere. I havn't overheated the truck since I've owned it. Unlike some people in AZ. I keep an eye on my gauges, and took the advice of checking it when I fill up. I have to add maybe an 8thor less of the reservoir every week or so. There is no water in the oil and it doesn't smoke any, but I can't find the leak. Any suggestoins would be appreciated.

 

I would suspect that your friend did not take enough time while pressure testing for the leak, it has to show up on the guage, get it done again before you start getting into the hot weather.