Carbon Monoxide + Nitrogen

[Chronic]

I have a tank of 20% Carbon Monoxide Calibration Gas in 80% Nitrogen 550L with a regulator, flow meter, and non-rebreather oxygen mask. Do you think this would get the job done? Nembutal seems to be the ideal way to go but is difficult to obtain and from my research carbon monoxide and nitrogen seems to be the best alternatives. I'm claustrophobic and don't really want a bag over my head and the idea is that if I did it in a car which is enclosed the carbon monoxide would be fatal within a couple minutes. Carbon monoxide is what Kevorkian resorted to and seemed to work well but he was using 100% carbon monoxide from what I understand. I'm also hoping this would be a painless method.
My gas is 200,000 ppm carbon monoxide...the internet says 12,800 ppm: After 1 to 3 minutes, you may lose consciousness or die. This should work, right? At a flow rate of 15 LPM the gas should flow for 30 minutes.

 

[nobodycaresaboutme]

I guess it works much more in very small space like exit bags... The volume of mid-size cars is 3,115–3,395 L. If you do this in a car, the CO ppm will decrease to no more than 32,400 ppm (200,000ppm x 550L / 3,395L). This is still higher than the deadly level, but when taking account of leakage it's hard to predict...

 

[Chronic]

The non-rebreather mask should deliver a very high concentration of carbon monoxide so the vehicle size shouldn't matter but is kind of a fail safe. Do you think this would be painless?

"The biggest risk of a non-rebreather mask is that it can cause suffocation. This is because it doesn't allow you to inhale any outside air. You can only inhale the air inside the oxygen tank. So, when the oxygen tank empties, the person wearing the non-rebreather doesn't get air. A healthcare provider should watch you closely when you're using a non-rebreather mask to make sure the oxygen tank doesn't empty."