Stubborn Oil Filter

[Jules-C]

And if the screwdriver doesn't work cos oil filters are only made of thin metal .. you're focced

Once had the screwdriver trick not work after chain and belt wrenches just crushed the casing.  If you are VERY careful you can cut the filter baseplate into pieces without damaging the mating surface on the crankcase but it's not something I would recommend. 

Still had a job getting the final piece of the baseplate off the thread.  I think the thread had been damaged by an earlier attempt to screwdriver it off.

Normally use K&N filters now with nice 17mm nut on them