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Message: <blockquote data-quote="OlBrownTruck" data-source="post: 3957444" data-attributes="member: 41331">I agree with Shadow rider. I would change it at least every year regardless of the miles. If it sits for extended periods, everything above the oil level will 'sweat' over night when the temperature drops. That condensation will run down and pool in the bottom of the oil pan because water is heavier than oil. Then, when you start the engine, the first thing it gets is that water. It may not be much unless it sits for a very long time. It's worse in the spring and fall, when it cools off more over night. If you go out in the morning and there is a heavy dew, just know that the same thing is happening inside your engine. As I said earlier, everything above the oil level will sweat inside the engine.</blockquote>