if im looking to draw high amperage for starting in cold weather, what battery type would be the best to go with? say drawing 1000A for 10 or so seconds in -40F weather?
Zinc is mainly in racing oils for those with older engines using flat tappet cams and having no catalytic converter. That's why you don't see it in regular oils for todays cars. It's also technically not legal to use some racing oils in daily street cars. I don't know what you're talking about recommending zinc for small engines.