im having my car mapped tomorrow but im not sure on what fuel to have it mapped for.should i have my jdm wrx mapped for v power or super unleaded?would there be a difference in end product?the nearest shell garage is 7 miles away and there are 2 other garages 200yards away from me.what should i do?

 

Go for the fuel that is most common near you imo.

 

you will acheive a bit more power with vpower over super but ultimately it is your choice.

if you wanted an extra safety margin you could have it mapped for super but run it on vpower.