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Q: water in oil on 2003 Mazda B2300

From time to time I see little light brown spots in my oil. The engine is not overheating and there is no oil in the radiator resevior. Could the problem be something besides a head gasket leaking?
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When you say spot, are they greenish? if so, then that is coolant. Why not change your oil and really inspect it in the drain pan?? That should give you a more conclusive answer.
The spots are colored a light brown. I am not using any coolant and the engine is not heating up. I changed the oil and examined it and there were no spots in it. It looked just like normal used oil. Thank you for your response.
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