Oil Change - Sump Drain or Vacuum Pump?

[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.

[peteb]

I always remove the sump plug to drain the oil and let it drain for 10 to 15 mins the more old oil you get out the better, any old oil in the sump will contaminate the new oil and reduce it,s life

[Dingle232]

Originally Posted by peteb

I always remove the sump plug to drain the oil and let it drain for 10 to 15 mins the more old oil you get out the better, any old oil in the sump will contaminate the new oil and reduce it,s life

Thanks Pete I am tempted to give it another drain. Are there any special tools I need or is a normal wrench sufficient?

[fredm]

Hi there, you'll need an 8mm allen key or allen head socket to remove the drain plug. Also a new 14mm internal diameter sealing washer, copper or aluminium for the drain plug.

Not a fan of these suction pipes down the dipstick hole myself but I know lots of garages do use them now.

[Dingle232]

Originally Posted by fredm

Hi there, you'll need an 8mm allen key or allen head socket to remove the drain plug. Also a new 14mm internal diameter sealing washer, copper or aluminium for the drain plug.

Not a fan of these suction pipes down the dipstick hole myself but I know lots of garages do use them now.

To be honest I am ignorant of whether they are as effective as a traditional drain or not but, as I take care of my car, I need to know if the fact that he has used one on my oil change is likely to result in it not being as effective as a traditional oil drain.

There seems to be evidence to suggest that any oil left after using the suction method is completely insignificant. If that is the case then I'd be tempted to invest in one myself as it will save me significant cost and allow me to change my oil myself more frequently.

Does anyone else have a view or experience of using one?

I guess the experiment is to use one THEN remove the sump plug and see how much remains. I am just not sure how much 'old' oil is enough to render 'new' oil contaminated.

Thanks again.

[copperknob]

to be honest either way youll stilll have a little old oil even when you drain sump ,,i do it both ways but vacummm is easied ,£47 for 6 litre drain vacum pump from amazon ,