Originally Posted By: Quattro Pete
Originally Posted By: BarkerMan
The above statement that an extractor leaves 1/2 to 1 quart is too general. In some applications a vacuum pump will get it all and others it may get more than pulling the drain plug.
Exactly. In my 530i I can get as much oil via extractor as I can via the drain plug.
kcryan, you're lucky your BMW still has a dipstick. In some of its newest engines BMW has eliminated it, so there goes the oil extractor idea.
After I drain the oil using the drain plug in my BMW 330ci , I can pull out another 1/4 qt with the oil extractor through the dipstick tube. In this case, the extractor (just like they use at the dealership - BMW & Mercedes) works better than drain plug.
On my wife's Acura, after I have sucked the oil out with the extractor, if I open the drain plug I can only get about 3 more tablespoons to drain out. I'm not worried about that much left in the sump.
In these cars jacking the car up and draining through the drain plug adds very little to no value to me.
I wish my Chevy truck worked with the extractor but it doesn't. I can only pull half of the sump out. Same thing on the transmission. GM puts some kind of baffle in that prevents oil extractors from working. Next time I have the trans pan off, I'm going to correct that. Anyhow, for that vehicle I have a Fram Suredrain.