The Truth About “Lifetime” Fluids — Why They Still Need Checking
Walk into almost any dealership today and you will hear the same confident phrase: “lifetime fluids”. The idea is simple. Manufacturers tell customers that certain lubricants, such as automatic transmission fluid, coolant, or differential oil, are sealed for life and never require changing. For vehicle owners and fleet operators, it sounds like the perfect solution — no more messy maintenance schedules, no more fluid worries. Unfortunately, the truth is less straightforward.
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