B12 isn't available in Canada as far as I know. I used Redline fuel system treatment, which is available at the retailer of choice or default. Lots of black goonk on the end of the hose when I did it.

98 Silver Frost SVT 97 BMW 540I Sport, six speed "Blue is for sky, black is for soil, and white is for simplicity, purity and hope for the future" "A coveted car should never stunt your life, but should make it more rich and interesting."