Quote:
Originally Posted by CatalinP
My experience with this kind of vacuum pump to suck out all the engine oil via the dip stick pipe is not so good. I could not take out more that 5,5 liters of oil from my N57, that means 1 more liter of used oil remained inside. That is almost 20% of the oil... So I ended up buying 2 solid jack stands for the next oil change.
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User error? The max the Griot extractor can hold is 6.8Q/6.4L. If you begin to reach the limit, the suction will notably slow with the siphon line showing suspended oil. If you are at the max and are not convinced you got most/all, you simply release the vacuum of the extractor, pour some/all of the used oil our and then resume the extraction. I've never had an issue, and I've never had any sizable amount of oil in pan or filter housing.
Also, are you sure that missing quart/liter wasn't in the filter? A used filter would easily begin to make up the difference you were missing.