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Im a desiel mechanic and we never do that. in my schooling this is not even an idea. get the oil, put new in. with that method you may risk getting water into the oil-which is naughty. draining the system completly of oil is a bad manuever-it has to hide in small places so on the new intial startup you are risking any metal on metal contact such as in the rings/valves ect. a small drop here and there of old oil is now going to ruin a complete crankcase of new oil.
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Love it or hate it, my car can transform and kick your cars @$$! |