I've used DFA in the winter as anti-gel and had no problems. I've slowly learned over the years that you don't need to bother putting fuel additives in every tank, and it may actually be detrimental to the fuel system if you DO use the stuff all the time. I'd just stick a bottle of Red Line 85+ or Stanadyne in every 5-10kmi, and forget the bulk stuff (except as anti-gel in REALLY cold weather... sub-zero F.)
Regards,
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