Euro 328 Oil Change - NEED HELP!!

Have you checked the owners manual?

 

I've got a Euro (Swiss) 328 and you use a 17mm hex. Never heard of a Torx being used for the drain plug (by the way it's Torx not "torque")

 

Ditto what Erich said -- if you've got an engine oil drain plug with a female Torx drive feature, it must be a substitute/replacement. The style marked "308" in this jpeg is used on 308 and early 328 and the drain plug has a female hex drive feature. The one labeled "328" is used on later 328 and has a drain plug with a male hex head -- which style pan do you have? Or something else?
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If it requires a torx wrench, it's not original.

Dave

 

No, don't know what size Torx male bit you'll need for your particular unique drain plug, but sometimes you can get a large male hex bit to sort of work too inside a female Torx socket (if the drain plug isn't uber tight).

If they haven't also changed/modified the female thread in the pan for the drain plug, you might consider getting the correct stock one -- 10275011 (I think). It isn't very expensive:

http://www.ricambiamerica.com/advanced_search_result.php?keywords=10275011&x=7&y=8

but it could be the female threads in the pan got messed up/reworked too so check that first. The thread on the stock drain plug is a M22 size (i.e., major diameter of the male thread is 22 mm).
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Are you sure you are looking at the engine oil drain & not the gearbox oil drain?? As per the pic above, the 328 drain is on the horizontal & there will be "Oilio Motore" stamped in the casing somewhere near it.

I.

 

Why not just buy a cheap set of Torx sockets and be done with it? Well, as long as it contains the size you need. I'm sure it won't be the last time you will need one for something. A lot of cars use Torx hardware (along with other products). Oddly enough the screws that hold the engine lid insulation on my 328 are Torx screws. It's the only place I recall that they are used on the car.

If you ever change a drain plug on any car always see if you can find one with a magnet built in (if the original does not have one).

 

It sounds like perhaps you have Torx confused with a regular "Allen" type socket head. How many sides does the hole have? Is it star shaped? You are indicating that both the engine and transmission plugs have been replaces with a Torx plug? That sounds mighty fishy.
Post a picture up here and let us all have a look-see.

 

If you want to be sure to get the correct size the first time, then wipe the plug and pan reall well, put a piece of paper against it, and skim a pencil or crayon w/paper removed on its side to find the edges.