Synthetic oil can go a little longer than conventional oil between changes but going excessively long isn't a good idea. Oil is still relativel cheap. A better filter is a much bigger help. The place up here that does oil sampling, says it is better to buy the more expensive name brand oil(doesn't have to be synthetic) but they also sell 3 micron oil filter kits that can extend oil change intervals. I have a friend that owns a repair shop. He had a Ford truck with a gas engine come in because it was really sluggish and running horrible. The owner had synthetic oil in it for 25,000kms. When the valve covers were pulled off told the story. They had already run 3 oil flushes through the engine to try and clean it up. With the valve covers off, it looked like there was shredded rubber inside the engine. It was contaminated oil that had balled up into thousands of sticky little BB shaped particles. It was disgusting seeing an engine neglected like that. Dave
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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