IIRC, you need a 1/5 (Omega 3 / Omega 6) ratio, but our usual diet is so poor in the former that we end up deprived.
Palm oil, which is everywhere, has Omega 6 aplenty, and (virtually?) no Omega 3. In Europe, it is usually listed as "vegetal oil" in the ingredients lists. When it's not palm, they put the full name.
It is called different things in different places. Canola is actually a specific cultivar of Rapeseed. Canola actually stands for "Canada Oil" and the term probably isn't well known out of North America.
Palm oil, which is everywhere, has Omega 6 aplenty, and (virtually?) no Omega 3. In Europe, it is usually listed as "vegetal oil" in the ingredients lists. When it's not palm, they put the full name.