Mike..r u serious when you ask "WHY" if so..start here Valvoline.com > Products > Antifreeze Radiator Products > Antifreeze > Zerex G Research/read if your really interested. Your friends using water due to loss (no a/f) to save $ instead of fixing problem is understandable as emergency fix..certainly not long term. Good luck!
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03 F250 XLT SC/SB 4X4 6L (stock) A/T. SRW 3.73's BD:02/11/03. 01 TL 23' SGII
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