I found this place with the lowest price for a can of BG 44k:
http://store.yahoo.com/wyattarpdodge/bg44kfuelsys.html

But before I get it, has anyone else use it in a Max safely? O2 Sensor safe?

 

it is safe. its what the dealership uses.
and depending on how dirty your lines are, you will REALLY be able to tell the diffirence.
mine was like night and day

 

Definitely safe, and that's where I ordered mine from, was shipped promptly. Good luck!

 

thanks, ordered it.

 

I used BG44K before changing my fuel filter and noticed some pinging on occasion... it went away after changing the fuel filter. Beware though, changing the fuel filter can be a real pain, especially if you snap one of the fuel lines

 

Yeah I used it on my 2k2 and 2k. It works great. My local nissan dealer stocks this so I am fairly sure its ok to use.

 

I got bunch from there before. I didn't notice any difference w/ my car though.