No idea how accurate this is but I premixed my coolant to what I calculated to be approximately 45/55. Then checked using my Prestone coolant tester with the result of just under 45% coolant and protection to well below zero F.

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.