Back in the days before catalytic converters and unleaded fuel, there was a fair amount of engine repairing happening. I was there. Open up an engine that has been run for any length of time on leaded fuel, and you will see buildup of deposits. They will build up in the oil pan, any return passages in the block, the valley in a V-type engine, and every other little crack and crevice. Today, if you open up an engine, you will find it CLEAN!! As a matter of fact, I noticed this by the time unleaded gasoline became mainstream. There may be some carbonization of the oil, and in some cases some sludge, but nothing like in the old days.
Bottom line: lead is BAD for an engine. Period. Take it from one who has done major engine and transmission work all of his life.
Also note that Amoco has been selling unleaded gasoline for a very long time. Like back into the 1930s if I am not mistaken.
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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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