Vb- Not takin it the wrong way but you obviously dont know shit about tunning cars, pre 100/98/95 AU ron Fuel
like cars of the 80's especially porsches were meant to run on high octane 98+ but australia only had 92ron wat did they do nothing! Cars can also run on a lower grade of fuel regardless. Thats why theres knock sensors they retard the timing to compensate lol Basic Engineering for how long !!!!
Maybe just so you dont take it the wrong way read up on fuels and timing and so fourth, not In magazines lol!
Also cars that are tuned to run on a lower fuel will do so, you just Cant play with timing, @13 @15 so on!!
Id just like to say ppl that dont know shit like to add there 2c which rarely is a benefit to anyone, and it just ruins forums especially all the Know alls & there BS.
Also Pump fuel is never i repeat never what it says it is numerous independant testing proves this ten fold.
Nor can the manufacture ever get fuel 100%, due to quantities and demand.