Letting your car idle for five or ten minutes on a cold morning feels like the responsible thing to do — and for cars built before the 1980s, it genuinely was. But the engine under your hood today works on completely different principles, and that idling habit may be doing more harm than good.
Mar 13, 2026
Personal finance influencers have turned 'always buy used' into something close to gospel. But the used car market of 2024 looks nothing like the one that rule was built for — and the actual math depends on more variables than most people stop to consider.
Mar 13, 2026
Millions of Americans start their cars and walk back inside on cold winter mornings, convinced they're doing their engine a favor. The science tells a different story — and the habit actually traces back to a type of engine that almost no one drives anymore.
Mar 13, 2026