Does it have other fine prints? Read properly the T&C first.

Standard Charted got offer 15% rebate but I don't know much of the details.

You will enjoy Petrol CashBack in the following situations:
When you spend a minimum of RM999 but less than RM1,999 per month in retail purchases, subject to a cap of RM28 per month;
When you spend a minimum of RM1,999 but less than RM2,999 per month in retail purchases, subject to a cap of RM38 per month;
When you spend a minimum of RM2,999 or more per month in retail purchases, subject to a cap of RM48 per month.