Jack:
that's why the auto industry came up with Permatex gasket goop (commonly called RTV).
Goop up the part being assembled, torque it up somewhere near the required tightness, let it alone and it usually doesn't leak.
Can you do that on a VW oil strainer? NO! Why? Because, if you don't have an external oil filter you have to remove the strainer every time you change the oil and the Permatex is a B!+ to remove!
You can still try the permatex on your strainer, though, with this trick:
Get two new strainer gaskets and, using a tube of permatex with a bead nozzle on it (that long snouty cap that comes with it) that is cut to produce a 1/8" wide bead, run a continuous bead all around the gasket, just inside of the stud holes. Then. flip it over and run another bead around the other side. The trick is to make a bead of RTV that looks like big O-ring, not to smear it on.
Hang it up somewhere with a coat hanger to let the RTV fully set up (give it 30+ minutes - it should not be tacky to the touch. You can even do this the day before your oil change).
When time to change your oil, clean off the strainer and sump surface, then assemble everything with the two new RTV'd gaskets. Tighten as per notes above and it shouldn't leak.
When you do your next oil change, th gaskets should come right out without sticking. Hopefully, you've prepared 2 new gaskets well ahead of time.
Stand-by tomorrow for tips on cooking Collard Greens.......
gn