SHELL optimax VS BP ultimate FUEL ! For DOHC VTEC

[ATSEK4]

I am just wondering if the Shell optimax better or the BP Ultimate better for DOHC Vtec

Most of my friends said BP Ultimate has better power and even run the engine safter as it does not explode better than optimax.

A friend of mine told me that a honda dealer recommanded BP either.

Some said optimax is the best fuel in Australia.. and some said it is only good for turbo..

my gf's driving instructor said he used to read something was talking about shell and BP fuel. He said BP is always better, as it explode much better than shell..

Now i found everyone has different story

for me I could feel that shell optimax has better power, but i am not sure.. they both has 98 octane. Or maybe Shell has a cleaner petrol station, coles express discount that makes me feel better.

Any idea ???? just tell me how you feel or did anyone even put it on a dyno to test? but it must be done straight away.. like run with bp, clear the fuel tank put optimax ..