Everyone is ignoring what the article actually says and what the question really is - **Should you warm up your vehicle or just drive it? And what about revving the engine?** Answer - *The UK's winters aren't that cold and in the UK (where the article is written) it's usually ok to just drive. But in colder places, warm it up. Don't rev unless the engine is struggling. * The article is written in manipulative language. For example - A cold engine releases harmful pollutants, and can have problems down the line. What they're saying is true but they're saying it in a manipulative way. Any engine warm or cold, in summer or winter, new or old, releases pollutants and wears out the more you use it. Again, if it's above freezing, you can just drive. But if it's actually cold, warm it up (yes you are burning more fuel, releasing more pollutants, and wearing out the engine by using it more) but you need to get the thickened fluids flowing properly and the metal to warm up and expand. Allow the engine do this slowly at idle speed. Do not rev and force the engine to run at a high RPM when the fluids are thick and cold. If the engine is struggling at idle speed, rev it up to where it isn't struggling, but don't red line it. And once your vehicle is warmed up, don't suck on the tailpipe. Just because it's warm, that doesn't mean it isn't still releasing harmful pollutants.