I use this unit to change my Crossfire's oil also, it works like a charm.

I would not be that concerned about not being able to remove the "sludge"
in our cars oil pan, there just shouldn't be any!
We're not talking 1963 here with big old high mileage V8s using non-detergent oil.

Todays oils, especially synthetics, are not noted for their sludge making properties by any means. We all do our oil changes at the proper time, if
not sooner, and most have very low mileage to age ratios.

IMHO sucking warm oil out of our cars, replacing our filters with good quality fleece units, and using the proper weight synthetic oils, will not harm our cars prematurely.
It sure beats NOT changing the oil enough because it's too expensive at the dealer or too much of a PIA.

Peace
Paul