can go tng hubs at bangsar south or kl sentral.
otherwise plus toll cs at damansara, jalan duta, subang, sg besi, sg rasau, or batu tiga.

these above accept visa/master.

KL Sentral TnG Hub does not accept Amex. Last month i did a top up there.

tng hub at bangsar south = mon-fri 8:30am-5:00pm ; sat 8:30am-1:00pm
tng hub at kl sentral = mon-fri 10:00am-8:00pm ; sat 10:00am-3:00pm

plus toll cs at damansara, jalan duta, subang, sg besi, sg rasau, or batu tiga = everyday 7:30am-7:30pm (including public holidays)

all does not accept amex; only visa/master.

yep, they wont commit on commercial terms. must be sked we hold them responsible for making promises! 
if u spend mostly in KV, should be fine kot.

for TnG, i whacked about RM400-500 per swipe. not staying near Petronas Kinrara, so swipe it big!

for me, my whole month's spending are exclusive to AMEX  even on weekday spending, swiped with AMEX too. 

so far, my spend locations are: Petronas, TGV Cinemas, Starbucks, Watson's, Ichiriki and Vivo Restaurant, and the ever useful payment for UNIFI 

tomorrow will be the last weekend of the month, time to overpay some bills to maximize this month's CB 

Charge into amex. Meaning Rm101 will be charged into amex. And of the total RM100 credit, 50 cent will be taken off as service charge.

By thick faces manually go each petrol station and ask.