Some discounts used may take a little while to be reflected in your balance, and the Pumped Daily Discount from Z and Caltex may be higher on some specific promotional days. If you are using the mobile app, make sure you are connected to the internet so that your balances are refreshed. Also Pumped Stacked balances are unique to each Flybuys cards or Z/Caltex mobile apps. Fuel discounts aren't available with fuel card or Z Sharetank purchases.