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52BMan, Reading smoke is a bit like reading tea leaves. Usually a white - gray color is too lean. Pure white indicates water vapor. And a blue-white is oil. Gas in the oil could be weak rings, or - if you have the oil pressure shutoff to the fuel line setup, could be some backward leakage. A more blueish type color should be indicative of oil being burned. Could be crankcase pressure forcing oil back up into the combustion chamber, or just weak rings. I'd also check fuel flow, as it could be leaning out from lack of fuel under heavy load. That would probably be my number one suspect. Also a partial induction leak could cause a sympton you describe as outside air would only seep in under high vacuum levels. So... I'd do a compression check wet and dry to check the rings. Check the fuel flow for obstructions, or even a low float bowl setting, check the crankcase breather, check the oil pressure / fuel shut off system and check for induction leaks in and around the manifold. A lot of things to do, but you may have more than one problem. Good luck with it. Steve
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