Saw this on my rewards app as well. Seems to be unique code everyday so please check your app to get yours.
A. Offer is limited to a discount of 6 cents per litre of fuel (unless otherwise stated) purchased in a single transaction from 1 July to 31 July 2019. In addition, myToyota members can also enter and receive one (1) automatic entry into the $1000 Caltex StarCash Card promotion, when they purchase fuel using the myToyota fuel offer in myToyota (i.e. scan the QR code from myToyota via a smartphone or device at counter at time of purchase) and a Meal Combo in one transaction at participating Caltex service stations from 9 July 2019 01:01am AEST to 31 July 2019 23:59pm AEST. Judging will take place 2 August 2019 15:00pm AEST.NSW Permit No. LTPM/19/04379. For full competition details click here from 9 July 2019 and a list of participating stores, visit here.
B. Offer is limited to one transaction per vehicle registered on myToyota during a 24-hour period from the time of the last transaction.
C. Offer is limited to the filling up of the fuel tank of one vehicle at a time.
D. Offer applies to transactions on eligible fuel only. Offer applies to: Unleaded (ULP), Vortex Premium 95 (PULP), Vortex Premium 98, Diesel and Vortex Diesel, up to 150 litres.
E. The Fuel Offer is only available at participating Caltex locations. For more information click here. Participating Caltex locations are subject to change without notice and is at the sole discretion of Caltex.
F. The Offer is only available to guests who:
i.have a myToyota account;
ii.have a vehicle(s) registered in Garage (including VIN and registration details); and
iii.have installed the myToyota app on a compatible smartphone or device or have accessed the Offer via myToyota online.
G. Toyota and/or Caltex reserve the right to refuse to provide the Offer to an individual if, in its reasonable opinion, it cannot verify that they are eligible to receive the Offer or believe the individual has engaged in fraudulent activity or are otherwise in breach of these terms.
H. Offer is not available in conjunction with any other offers or fuel discounts unless specifically stated.
I. If there are any technical issues with the myToyota application or with the Caltex Scanner App Redemption Mechanism at participating Caltex locations, Toyota and Caltex will use reasonable steps to honour the discount.