Gas line anti-freeze

Sorry about this but I posted the question below on the 20th and now I can't see any posts before the 21st. Perhaps someone could tell me how to find it, plus any replies, or just repost the answer.
Many thanks.
Roger
------------------ Original question:
Here in Canada our Canadian Tire store (auto parts dept) sells gas line antifreeze for CDN$12.99 for 4 litres. It also sells 99.9 % pure Methyl Hydrate as stove and fondue fuel (and some other uses I don't recall) for CDN$7.99 for 4 litres.
I'm not a chemist (nor a chemical engineer or engine specialist), so my question is: can 99.9% Methyl Hydrate can be used as gas line antifreeze?
Also, does anyone know the difference between these two products? (Other than price.)
Thanks for all replies.
Cheers,
Roger
--
Roger Jones, P.Eng.
Thornhill, Ontario,
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