This is the response from Byrons with my previous Q's:
We do make Mugen Fuel and their fuel is made a little differently according to their needs. However, we do not make a bad fuel and you cannot go wrong with either Byron or Mugen.
We tried plugs in the bottles once upon a time and since the bottles and plugs came from different sources, a slight varience one way or another on either product would result in a poor fit and a leaking bottle, regardless of how the cap sealed. So we decided to go with a good seal on the cap only.
We do not use a foil seal simply because that requires induction and induction is done by electromagnetics. We have tried to locate a supplier of electromagnetic induction sealing equipment that will provide us with "explosion proof" equipment but no one wants to go out on the limb. If you find foil seals on bottles of model engine fuel, you can be sure the bottler is taking his own risks on applying that seal and we value our employees too much to do that.
I hope this answers some of your questions. While a hermatically sealed bottle would be great, freshness is generally not affected and tamperproof security is not worth the potential dangers.
Best regards,
BYRON ORIGINALS, INC.
Very informative company over two questions?
