bosh o2's vs GM's
 

Is there a big difference in the fbody o2's between the both? i.e. is the heating about the same? which one can handle higher temps? all that sort or stuff. Im asking because ive been getting very bad gas mileage and ive changed the o2s, but to the bosh-not the delco's.

I believe they perfrom the same, but that the bosh's do not last as long.