your additiona 3% off your credit card bill will comes in abt 1 or 2 mths time... slight delay... think the addtional 3% promo only started around march.. if you pump esso think shld be able to see the advertisement abv the pump... heehee
only have station 5% if you got the smiles card... got to use it together with citi dividened to get 5 + 5 + 3... 
I don't think there is any additional 3% after getting 5 + 5 on Dividend Card. I believe you are referring to the + 3% for the Esso Mobil Privilege Card by CitiBank? Normally, they will not overlap credit card benefits.
Quote from Citibank site "You will get an additional 3% discount on Synergy fuel ON TOP OF the prevailing station discount, or a minimum discount of 6% *, whichever is higher.
If the prevailing station is offering 10% discount, you will enjoy 13% discount on Synergy fuel when you use your Esso Mobil Privilege Card. When the station is offering Synergy fuel discounts less than 6%, you will still enjoy a minimum of 6% discount."
More info here:
http://www.citibank.com.sg/SGGCB/APPS/portal/loadPage.do?tabId=Credit%20Cards&path=/prod/det/cc_xx_ess.htmWe can't use both Div & the Priviledge card together anyway.