Withidl,

The MSDS sheet for Texaco and AC-Delco Dexcool lists the following:
Ethylene glycol
Diethylene glycol
Potasium 2-ethylhexanoate
Water

They use Potasium 2-ethylhexanoate Vs. Sodium 2-ethylhexanoate which is stated on the Prestone label. Apparently not all dexcool is created equal. Suprizing? Not really.

In either case the supposed benifit to Dexcool is that it forms a "protective barrier" to prevent corrosion. I suspect that "protective barrier" is what is causing the the gelling that I and so many others have found in their coolant systems. The PH of Dexcool is acutaully more acidic than that of the green stuff. Go Figure.

As far as the original question of this thread. You cannot mix Dexcool type antifreezes with other types (says so on the label). You can; however, mix the green stuff with all types (again, says so on the labels).

In all seriousness, I respect your brand loyaty; however, I personally don't think Dexcool is a better mouse trap.

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2007 Suzuki Vinson 500 4X4
2007 Toro 6.5hp
2006 BMW X5 4.4 ltr (his)
2001 BMW X5 4.4 ltr (hers)
1994 Honda XR650L
1984 Honda XR80

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