Now I always changed my oil BEFORE use.Because I'm a mechanic by trade, I change my oils in all my vehicles every 3,000 miles. All my vehicles have lasted over 200k before I sold them, that speaks for itself. On another note, I change the oil in my bike before I put her down for the winter. That way the oil's fresh when I start her up in the spring. Also, used oil has acidic qualities that don't bode well for the internals when sitting in storage for months at a time. Just my two cents worth.