Dragstar Performance Centre (motorsport shop located at Aman Suria) accept AMEX but with a 3% surcharge.

Went to Viewnet (The Hub) today and was told that I cannot pay with AMEX, the lady said no machine or something... then I saw a poster-like note on the cashier.. something along the lines of "there is no surcharge for credit card.. minimum RM50 for cc usage", with VISA and MASTERCARD logo.. No AMEX!

So far all the BHPs that I've been to only accept AMEX at the cashier.. (excluding the one near The Curve, was told AMEX is not accepted at all)

Recently BHP TTDI upgraded their terminals.. but to my surprise AMEX is still not accepted at the pump.

Can add to the first page:

AMEX accepted
Absolute Thai, One Utama

Previously known as 'Just Thai'. I can't remember if they have been accepting amex since then even though I regularly eat there, but I noticed that they now use Maybank's CC terminal.
...and with that, the 15% discount with cimb cards are no longer available
(that's why I can't remember whether amex can be used since back then, because I always use my cimb card there )

More OT:
They have their own loyalty card now (RM15), but the discount is only 10%.. but on your birthday month or something you'll get more discount, can't recall the details.