The meaning of "porous block" which was the title you chose for the thread.
Everybody thinks that GM uses words the same way real people do. "Porous block" is usually interpreted as holes in the block where fluids pour out.

I really didn't think it needed an interpreter. I guess I need a American English to Canadian English vocabulary book. Even though they seem to be the same words.

 

I see the "porous block" issue as an opportunity to get a great deal on a 2008, since people whose knowledge of the issue begins and ends with a cursory Google serch are afraid to buy one.

Oil in the water and vice versa is much more likely to be a result of a head gasket problem.