Oil & fluids
Engine oil intervals, coolant chemistry, transmission fluid, and why fluid condition matters more than the mileage clock.
Oil change service →April 8, 2020
How Often Should I Have the Oil in My Vehicle Changed?
Manufacturer intervals have stretched to 5,000–15,000 miles, but engine design and driving conditions still matter. Here's how to think about the right oil change schedule for your vehicle.
Read article →July 11, 2019
How Often Should You Service Your Car's Coolant?
The right coolant service interval depends on which type of coolant your vehicle uses. Here's a breakdown of coolant types, service schedules, and why pH balance matters.
Read article →February 2, 2017
Why Are the Fluids in My Vehicle Dark and Brown? Do They Really Need to Be Changed?
Dark or brown vehicle fluids mean contamination and breakdown. Leaving them dirty can cause abrasive damage to the systems they protect. Here is what to watch for.
Read article →May 10, 2010
The Best Way to Take Care of Your Automobile's Cooling System
Flushing your coolant every 2 years keeps the pH in range and protects against corrosion. Here is why the chemistry matters and what happens when you skip it.
Read article →