• i was on the road so bought a big flask of premixed stuff from a BP garage

    am thinking buying a huge container of concentrate to keep at home would be a better idea (and then have some premixed in the car in case of it running out)

  • (and then have some premixed in the car in case of it running out)

    It's better to just check it and top it up once a month or so at the same time as checking tyre pressures, tyre tread depth, oil levels, etc.

    You do check those things regularly don't you?

  • Go to an automotive place and pick one that you like.

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