What causes sludge in oil?

What causes sludge in oil? Causes. Sludge is usually caused by a poorly designed or defective crankcase ventilation system, low engine operating temperatures, the presence of water in the oil or crankshaft-induced cavitation, and can accumulate with use. How do you stop oil sludge? 4 Extra Tips to Prevent Engine Sludge Make sure that you … Continue reading What causes sludge in oil?