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Reply to "Toyota Engine Oil Sludge/Failure"

I have been in the automobile business for almost 40 years and have found that pcv system has lots to do with sludge..if the crankcase is not ventilated properly, then moisture can build in the engine helping to create sludge. And as another post said, the extended oil changes don't help especially when most drivers just run a few blocks around town at a time never allowing the oil to properly heat and evaporate the moisture
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