The routine fluid changes that keep an engine and drivetrain running well — most of these are DIY-friendly with basic tools. How we choose these picks.
The right oil weight and spec is listed in your owner's manual or on the oil fill cap — using the wrong one can affect both engine protection and fuel economy.
Reusing an old filter with fresh oil defeats much of the point of the change — a new spin-on filter is cheap insurance and takes seconds to swap.
A low-profile drain pan and a filter wrench are the two tools that make a DIY oil change possible in a driveway without a lift.
Transmission fluid type varies significantly by manufacturer and is not interchangeable — check your owner's manual for the exact spec before buying.
A pre-mixed coolant saves the guesswork of diluting concentrate correctly, and the right formula matters for corrosion protection in aluminum engines.
Brake fluid is hygroscopic — it absorbs moisture over time even in a sealed system, which lowers its boiling point and is why manufacturers list a replacement interval.
Check your owner's manual or the oil fill cap, which lists the manufacturer-specified viscosity (e.g. 5W-30). Using the wrong weight can affect both engine protection and fuel economy, especially outside the recommended temperature range.
It varies widely by vehicle. Some automakers list "lifetime" fluid, which many independent mechanics still recommend changing around 60,000–100,000 km in practice, while others specify official intervals closer to 48,000–96,000 km. Check your owner's manual for the manufacturer's actual interval rather than assuming a universal number.