I claim no expertise, as this is the internet and my credentials are entirely virtual and imaginary. * Business insider is often a click bait. * Taxis and Pol

I claim no expertise, as this is the internet and my credentials are entirely virtual and imaginary. * Business insider is often a click bait. * Taxis and Police cars idle all day. That's fine because their engine is warm. We're talking about damage being done at cold start and idle. * The only time the engine is without much lubricant is when it is cranked. * When the engine has started and running, oil is forced into different places that need it. Viscosity is not optimal, but it's good enough, as long as it's been changed appropriately, and not already a sludge. * At idle, the oil pump is at its lowest output. The fast idle at cold start mitigates that. Fast idle also warms up the engine faster than normal idle. Driving it will give it good output. * Engines do warm up slower when idling (<1k rpm) vs driven right away (2k+ rpm). Taken all this together, it's fine to start the engine when cold, let it idle for 30 seconds, and start driving. It's also fine to start the engine cold, and let it idle and warm up while you scrape the windshield and make a cup of coffee. Millions of people do both of the above, and their cars are fine. Ignore Business Insider, and maintain your cars as per its manual.