[Dingle232]

The guy who did my oil change yesterday used one of the vacuum pumps rather than remove the sump plug and drain from the bottom. I have noticed is that the oil was still black very quickly after the 'new' oil had been added and am a little concerned as to whether this method has actually resulted in an 'oil change.' It has been suggested to me that these devices never remove all the oil and therefore any new oil is quickly contaminated. I am no expert.

My car is a diesel so am aware that the oil blackens more quickly but if, as suggested here, his method of using one of these has resulted in old oil remaining in the sump is that anything I need be concerned about as the car is not due another oil change for 12 months now?

Would I be better forking out (again!!) for another oil change using the sump drain or are the vacuum pumps acceptable for an oil change? If they are I'll buy one myself.

Thanks in advance.

PS: If I drain the sump do I need a particular sump plug tool or will a socket set do it? S40 2008 2.0D.