if i apply for maybank 12 months 0% BT to my maybank credit card today, do you think i can get it approved by 31 dec 2016 to enjoy upfront fee waiver?

mbb bt promo already shortened to 31 dec 2016

Yes, counted as petrol transactions.

Try applying EzCash and you may see the rough available limit.

yes

You need to do at CDM or IBG.

you wanted to avoid paying interest in current statement balance, but if your previous balance still not cleared, definitely sudah kena interest as well. 

always try to avoid accumulating balance for >1 month. always settle monthly statement balance, on time. rinse and repeat each month. furthermore, it's a good practice to do so, make you disciplined in managing repayments.

If kena interest statement will written as management fee with % sign

Amount not written that mean no kena.

that line is just a notice to inform you of your current interest/mgmt charge rate %.