gets more oil out.... Completely impossible because the bottom of the drain pain is the bottom of the plug hole.
AI actually tried one to see what the fuss was about, then pulled the drain plug to see how much those things leave behind, it's quite a bit.
Oil extractors are the dumbest invention ever because the crud in the bottom of the pan never drains out as it should be. Just like those that use them on Honda transmissions then blame Honda making a bad transmission.
The drain plugs are there for a reason. Not just to drain oil for oil change, but oil pan acts as low place for carbon and other bits to settle then be drained out when plug is pulled.
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