Fix-a-Flat or The Spare?

Fix-a-flat works, but unless you’re a “hyper-miler” who needs to shed excess pounds from the trunk to save gas, our advice is to go with the spare tire set.
Fix-a-flat in a can is a propellant (Butane, Propane or Isobutane) mixed with glue; A sticky, poisonous and milky solution that you spray into the tire through the valve stem, to pump up [...]