guys,
i have 88 hatch with b16a, p30 ecu..
when i stop at gas station,
do i need super premium, or regular is enough?

 

Use premium the cr is rather high and not content with low grade gas.

 

in my area, we have 87, 90, and 92. i've always used 90 for my B16A and havent had any problems. now that i will be supercharging, i will have to use 92. 90 should be sufficient for you, but i wouldnt go lower than 90.