Sharetank is a trial product and during the trial period the litres will not expire. But the idea of Sharetank is that you do actually use the fuel that you purchase, as Z cannot provide refunds. If the Sharetank trial is ended, we will give you as much notice as we can (at least three months) so that you can use any remaining Sharetank litres. 

See Sharetank Terms and Conditions for more.  

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