Maintenance

A car battery replacement costs $100–$350 installed. Compare standard vs AGM prices, where to get free installation, why Costco does not install, and how to save.

Charge a car battery by connecting red to positive and black to negative, choosing the right setting and letting a smart charger work. See charging times, AGM tips and safety.

Check your oil with the dipstick between the two marks, and change synthetic oil every 5,000–10,000 miles. See oil types, how much your car needs, signs of burning oil, and disposal.

Clicking, slow cranking and dim lights point to a dead battery. Learn how to test it with a multimeter, tell it apart from the alternator or starter, and find a parasitic drain.

A car inspection checks brakes, tires, lights, steering and emissions, takes 15–60 minutes and costs about $10–$80. See what is checked, which states require it, and how to pass.

Change your engine air filter every 15,000–30,000 miles and cabin filter yearly. Step-by-step guide for both, signs they are dirty, which type to buy, and shop costs.

Most car batteries last 3–5 years, less in hot climates. Learn what shortens battery life, warning signs, how to test it, and how to make your battery last longer.

Check your oil, coolant, brake, transmission, power steering and washer fluid in 10 minutes. Step-by-step guide with healthy colors, intervals and leak colors.

Disconnect the negative terminal first, then the positive. Step-by-step guide to removing a car battery safely, cleaning corrosion, and choosing the right replacement.