GM in general, especially those 3100 and 3400's my mechanics teacher calls them the perfect strom because like really who remembers to change there coolant right? But in the 3100 and 3400's if you didnt change the coolant it would act as an acid and actually eat your engine! happened to my fathers 2005 impala, had 270k on it, coolant never changed once.
Durex Condoms. I don't trust them.
I'd have to say Jeep or Kia. Not a big fan of anything about them. I can't believe people really dislike Pontiacs that much. I miss my grand prix everyday, and can't wait to start looking for a G8 6 speed once the LS is paid off.
270k with no coolant change really isn't that bad. How many intake gaskets did he go through in that time? From what I've heard, the 3100s were notorious for those.