Activate the offer on flybuys website.
You can stack this with the 4c off docket and in-store 10c off (spend $20) offer.
Here are some copy/pastes from the page:
Come into your local Shell Coles Express and save 10 cents off per litre of any fuel purchase.
Simply activate this offer refuel at Shell Coles Express and present your flybuys card!
Offer valid from Fri 28 April to Thu 4 May 2017
Terms and Conditions
*Save 10c off per litre offer valid when spend a minimum of $0.11 on fuel on any fuel transaction during the promotional period from Fri 28 April to Thu 4 May 2017 at Shell Coles Express. 150 litres max fuel purchase per transaction in one vehicle and approved containers only. Excludes Adblue, Fleet Card, Shell Card, Motorcharge and Motorpass purchases. This offer can be redeemed multiple times during the offer period. To qualify for this 10c per litre discount offer, you must activate this offer before refuelling at any Shell Coles Express and present your flybuys card at the time of purchase. You have been specifically selected for this offer and it is not transferable. This offer has been sent to you by flybuys. flybuysâ privacy policy applies. Standard flybuys terms and conditions apply and are available at flybuys.com.au.
^Save 4c off per litre at Coles Express when you hand over your Coles 4c/l receipt. 4c fuel discount voucher received when you spend $30 or more in one transaction at Coles Supermarkets. Limit 1 receipt per fuel purchase up to 150L, per vehicle, per customer. Excludes Fleet Card, Shell Card, Motorcharge and Motorpass purchases. Copies of the receipt will not be accepted and voucher must be surrendered upon redemption. Receipts or vouchers that have been defaced, damaged or altered or have passed their expiry date are not valid for any Fuel Discount Offer.
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