The five fluids under your hood, what each one is actually doing in there, and why “just top it off” isn’t always the right answer.
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Overfilling vs. Underfilling: Why Both Are a Problem
More fluid is not automatically better. Overfilling can genuinely hurt your engine, not just underfilling.
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Washer Fluid: Why the “Just Use Water” Trick Backfires in Winter
Topping off with tap water feels free and harmless — right up until the first freeze cracks something under your hood.