Thanks Larry,
Nope not worried about a fuel problem...the tank was sealed well as yesterday when I opened the cap I could hear the pressure release. Just don't want to cause problems upstream...I had just replaced the fuel injectors prior to storage (along with other maintenance items). I'm not familiar with B12 (I just googled it and found some info on it)...is there a big difference between that and other cleaners (lucas, etc.) in your opinion?

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1988 Mercedes-Benz 300E 5 Speed ~200k
1958 Mercedes-Benz 190SL (sold)
2000 Mercedes-Benz ML55 AMG ~230k - FOR SALE
2003 Audi A4 1.8T Quattro - Wife's Car
2007 GL450