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Oil Changes
Engine oil breaks down over time and loses its ability to lubricate. Skipping changes causes metal-on-metal wear, overheating, and eventually engine failure — the most expensive repair there is.
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Brakes
Worn brake pads turn into a rotor replacement — a $600+ job instead of a $150 pad swap. Beyond the money, bad brakes are a direct safety risk to you, your passengers, and everyone else on the road.
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Air Filters
A clogged engine filter starves your motor of air, dropping fuel economy by up to 14%. A clogged cabin filter means you're breathing in pollen, dust, and pollutants every time you drive.
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Fluids
Coolant, transmission fluid, and brake fluid all degrade. Old coolant corrodes your radiator. Old brake fluid absorbs moisture and reduces stopping power. Old transmission fluid causes $3,000+ in damage.
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Spark Plugs
Worn plugs cause misfires, rough idle, poor acceleration, and tank your fuel economy. A $40 plug set at 30k miles prevents a $200+ diagnostic visit later.
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Timing Belt / Chain
This is the one people ignore until it's too late. A snapped timing belt at highway speed can destroy your entire engine in seconds — a $5,000–$10,000 repair. Replacing it on schedule costs a fraction of that.