MityVac or one of the endless number of clones. I use that [censored] for everything. Car oil changes? Yep. Generator and OPE? Absolutely. Transmission drain and fill? Of course. Sucking out half the plastic transmission dipstick after I broke it and it fell down into the trans? That's the day I finally stopped feeling guilty for spending so much on it.Have you found a good way to dump the oil on those? I have one. Kind of a pain to tip the mower on its side. To keep the oil drain pan from scooting away, I have to put some things down so it can push up against a wall. I have the HRN version though with the GCV170.