Oil changes aren't as frequent for all vehicle makes and models as they once were. Now that new engine designs require longer-lasting synthetic motor oils, the old mechanic's rule of thumb to change your vehicle's oil every 3,000 miles or three months doesn't always hold true. Some vehicles are designed to alert you when it's time, while older vehicles leave it to you to remember. There are a few signs that your Subaru may need an oil change service soon:

  • Dirty or dark-colored motor oil
  • Increased motor noise
  • It's been over six months since the last change

The primary reason you need to change a vehicle's motor oil is because its filter becomes clogged with dirt and debris. When that happens, the debris created by the motor's moving parts begins to build up in the oil. The oil becomes dark-colored and eventually turns black. The debris is made up of tiny metal filings from the engine's moving parts. As the debris builds up, it begins to scour the engine as it circulates in the oil, causing engine wear-and-tear to accelerate.

Another reason oil changes are necessary for Lewiston, ID Subaru drivers is that motor oil breaks down in the high temperatures inside a vehicle's engine. Motor oil gradually loses its ability to lubricate the engine's moving parts, causing friction damage. Synthetic oil resists this gradual breakdown much better than regular motor oil, which is why it can go longer between changes.

It's also a good idea to bring your vehicle in for regular oil changes because it gives our service technicians an opportunity to inspect your vehicle for other problems that crop up over time, like fluid leaks and low tire pressure. If your vehicle doesn't alert you when it's time for an oil change, it's a good idea to put regular changes on your calendar.

Categories: Service