An oil change means draining the old engine oil, replacing the oil filter and refilling with the type and amount of oil your engine calls for. It's simple maintenance, but skipping it is hard on an engine.
Oil does more than lubricate. It keeps moving metal parts from wearing against each other, carries heat away, and holds dirt and combustion byproducts so the filter can catch them. Over time, heat breaks oil down and it fills up with contaminants. Worn-out oil doesn't protect as well, and that leads to sludge, extra wear and eventually expensive engine repairs.
How often you need a change depends on your vehicle, the type of oil it uses and how you drive. The owner's manual is the place to start. Many newer vehicles also have an oil life monitor that tracks how the engine is used and tells you when a change is due. Either way, the right interval is the one your manufacturer recommends for the way you actually drive.
Towing, lots of short trips, dusty roads and mountain driving usually count as severe service, and that often means changing oil sooner. Short trips are harder on oil than they sound, because the engine never gets warm enough to burn off the moisture and fuel that collect in the oil. Between long grades, towing and cold winter starts, a lot of driving around Missoula falls into the severe category.
Using the right oil matters too. Engines are designed around a specific oil viscosity, and many newer ones require synthetic oil that meets a particular specification. We use what your manufacturer calls for.
Between changes, check your oil level now and then, using the dipstick if your vehicle has one. Some engines use a little oil between changes, and running low is hard on any engine. If the oil pressure light comes on while you're driving, pull over and shut the engine off as soon as it's safe.
If we notice anything while your vehicle is in, like a leak or a worn belt, we'll tell you what it is and whether it needs attention now or can wait.