i asked this very question nearly 15 years ago whilst at college learning motor vehicle engineering... aparently antifreeze doesnt have the same cooling properties as water..... if that has changed since then i have no idea....
--------------------- Avus Blue '95 ///M3 Help with the fight against cancer. Team BMW
Just tried again after running the engine and the test tool is reading exactly what I would expect, around 40-50%. :speechless-smiley-4 I guess the antifreeze settles out on top of the water if it's left for a few days.
did a little search & found this... not quite -7 but getting that way
---------------------
Nick '01 M5 Carbon Black/Black Heritage - Sold 7/04 '98 M3 Techno Violet/Dove Grey - Sold 1/06 '01 M5 Royal Red/Caramel Heritage - The Beast is back On the way: DVD MK4 Nav Bluetooth Phone Kit Dension iceLink UUC Evo3