I always start from a completely drained system. I also keep an empty antifreeze jug stashed for mixing purposes. I pour in about 40-45% AF and top off with water, then pour that mix into the system after checking the ratio with the tester. Continue the extra jug mix method until the system is full, then add a bottle of Redline's Water Wetter.

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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.