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I inherited my dad's bike which I ride maybe 200-500 miles per year. I typically change the oil when I feel like it or when I remember which is probably around 18 months on average. Any issues with this or should I do more of a yearly change? I also change the filter every time, which I think may be overkill for the low mileage but figure might as well while I'm down there. I'll have the oil analyzed on the the next change to get some hard data.
In the meantime, any thoughts on this?