Maintenance & DIY

What Mechanics Must Do to Service Sealed Automatic Transmissions

October 17, 2026July 5, 2026 by Sofía Martínez

Modern automatic transmissions are increasingly ditching the traditional dipstick in favor of “sealed” units, marketed with “lifetime” automatic transmission fluid (ATF). But here’s the catch: there’s no such thing as a forever fluid. Servicing these sealed gearboxes isn’t a DIY…

How Often Should You Replace Your Engine’s Oxygen Sensors?

October 17, 2026June 21, 2026 by Marcus Webb

Oxygen sensors (O2 sensors) are critical to your engine’s performance, but unlike oil filters or spark plugs, they don’t come with a strict replacement schedule from automakers. Instead, their lifespan depends entirely on usage, maintenance, and operating conditions. While some…