IYAS9YAS lets his engine oil drain for 4 minutes or so. I allow mine to drain for 2+ hours. Which one use has eliminated a better percentage of dirty oil and metallic particles from their engine?
lol...
Actually, on warm oil (not hot), it takes about 25-30 minutes. Either way, unless we both tear the engines down, take them to the shop, have them boiled clean, and then put them back together, we're both leaving used oil and crud in the engine.