I have been using Envirosafe or "Freeze 12" for a year in my Saab with no problems. I'm now using it in the 1969 280 SEL and it seems to work just fine. It blows cold and I haven't been blown up yet or lost my nads. Life is good...
Thom

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1987 300E
1967 Jaguar E-type Series I, 2+2