The brand and weight of oil you use has no effect whatsoever on passing a smog test. Use the exact weight of oil that is recommended by BMW.
No, it will not pass the smog test with a defective or removed O2 sensor.
Save your money and put it towards repairing the reason it won't pass. There is no "magic potion".
the opdomiter does not work, will it pass smog? opdomiter, not sure what that is. Please define.
Get it fixed.
Yes that used car should pass smog inspection.
There could be many reasons why your car will not pass the smog check in your state. The inspection center should have given you a code as to why the car failed.
yes
the shop I go to said that my 2000 Jetta would not pass the smog check when the catalytic converter went bad.
The answer to this question is fairly complex. We recommend you visit the link below to find out how to pass the smog check and what might cause your vehicle to fail... http://www.smogtips.com/passing_inspection.cfm
The smog pump is designed to help clean the air the exits the exhaust. It might actually be detrimental to remove it if you have to pass emissions testing.
You certainly can trade your car in even if it won't pass a smog check. Some people will even let you trade cars that don't run.
If your engine is burning oil there is a good chance it won't pass a smog test. You should get it to a mechanic immediately as it's not only a danger to the environment, but possibly could be a danger to you.