I was told by an antique engine builder/machine shop operator....to NOT use any detergent oil in an engine that has been using non-detergent oil . His reasoning....the detergent oil starts to loosen up the years of sludge buildup and this fine material (kinda like pumice or a very fine sandpaper) circulates through the engine and wears it out in no time at all. He told me that he would only use detergent oil in an old engine that has been thoroughly cleaned/washed out completely including the oil galleries. I followed his advice....i use the detergent stuff only in the engines that i completely tear down and the old ones that see only partial teardowns i still use the non-detergent oil. You will probably get alot of different thinking on this subject....this works for me. Most of the really old engines do not have oil filters and even if they do...i doubt that they could strain out the floating residue before causing some real internal damage to the engine. It"s one viewpoint for you to ponder.
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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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