This has not expired. I just did it and received the discount code.
The Discount Offer is a single 5c / litre fuel discount at any participating Shell service station Australia-wide (excludes Shell Coles Express branded sites).
The discount offer is redeemable on all fuels excluding LPG and Adblue at all participating Shell service stations.
This offer is valid for one transaction only. Limit of 150 litres per vehicle per customer in one transaction. Offer not valid for Fleet Card, Shell Card, Motorpass or Motorcharge transactions. Offer may not be combined with other discount offers (such as Coles shopper docket petrol discount offers).
Entrants may access the discount offer more than once during the Pilot Promotional Period, provided that each entry satisfies the conditions of clause 4.
The Tell Shell survey fuel discount can only be registered for by a customer at a maximum of once every seven days.
After fully completing the Tell Shell on-line survey during the Promotional Period in accordance with clause 4, Eligible Entrants will be issued an email with a single Discount Offer which has a validity period of 14 days.
Anyone know of a list of "non Shell Coles express" petrol stations? I haven't seen a plain "Shell" in years?