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Old 06-18-2013, 03:55 PM   #1
Ray Kelly
Join Date: Mar 2013
Location: East Bay
Posts: 465
Default Peak vs. Prestone

How many of you prefer one over the other? Or are you just like me: you buy the one that has the best price. But I do prefer Prestone.
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Old 06-18-2013, 03:59 PM   #2
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Join Date: Jul 2010
Location: Indianapolis
Posts: 2,327
Default Re: Peak vs. Prestone

If we're talking regular green coolant, coolant is coolant IMO. Most cars take fancy shit now. I have to use special Xerex coolant in my ordinary F150.
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Old 06-18-2013, 06:00 PM   #3
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Join Date: May 2008
Location: Palos Verdes, California
Posts: 315
Default Re: Peak vs. Prestone

Ummmm, no. All green coolants are definitely not the same. Prestone sorta pulled a fast one by changing the formula to an OAT coolant but the color is still green like the old silicate stuff. I use Prestone All Makes and Models coolant in everything except an old prewar Rolls-Royce, I was told in no uncertain terms that dire things would occur on that particular engine and radiator with anything but silicate coolant. Napa still makes it.

Peak used to be propylene glycol instead of ethylene glycol,if i recall correctly, supposed to be less toxic. I use it as rat poison anyway, so definitely need prestone to set out in little bowls for the rats.
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