Even if you don’t drive very often and you’re not hitting the recommended mileage interval, it's best to get your oil changed twice a year. Your oil may be fine, but it’s the moisture in your engine that’s the real enemy.
Do you need an oil change if you don't drive?
"If you're not driving it much, it should be done whenever the time comes up." Why? Because oil and other fluids break down over time. That water vapour tends to mix with your oil and forms a milky sludge, and that could necessitate an even earlier oil change – say, every five or six months or every 6,000 km.
Can oil go bad from sitting?
A short answer to this question is yes. Motor oil can only last for a certain period of time. For this reason, oil goes bad with time just by sitting in the engine. Over time, it becomes less viscous thus less efficient in maintaining proper lubrication between moving components.
How often should you service your car?
How often should I service my vehicle? It's recommended by manufacturers and mechanics alike, that a car should be serviced every 12,000 miles or every 12 months, whichever happens first.