Just checked a bottle of Prestone ... a 50/50 mix with water is
supposed to protect down to -34F.
My BJ8 holds 2.5 gallons of coolant. You could drain a little
more than a gallon, add a gallon of anti-freeze then top up with
water and you should be OK. Run your engine up to running temp
and run the heater after adding the AF.
Prestone makes an AF that is supposed to be compatible with
all types/colors of AF (it's green). It's a name brand, and Costco
sells a 2-gallon package for about $15 or so.
The "safe" AF uses propylene glcol instead of ethylene glycol. It's
more expensive, and the AF properties aren't quite as good as the
ethylene glycol type. Large auto parts stores (AutoZone, Pep Boys, etc.)
might carry it.
FWIW, I use distilled water in my Healey, and have for many years.
bs
***************************************************************
Bob Spidell San Jose, CA bspidell@comcast.net
'67 Austin-Healey 3000 '56 Austin-Healey 100M
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Subject: Anti-freeze
> I'm reluctantly getting ready to put my BT7 up for the winter. Here in RI it
> gets down to -5 f sometimes. --And I've been running the car on pure water,
> water-wetter, and no antifreeze.
>
> -Any recommendations on the type or brand of antifreeze to use or not to use?
> -Also, just for expediency's sake, can anyone give me the quantity needed to
> give the proper protection in a 6 cylinder car? --My intent is to drain
> enough water/wetter to make room to add the antifreeze, then run it long
> enough to get it mixed, before putting it up for the winter. --So I really
> won't be driving the car with the antifreeze in it.
>
> Is one any better than another for rust inhibition, etc?
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