If you guys really want a boost in MPG buy good gas from MOBIL/ EXXON or Chevron/Texaco
91 or 93 oct on those newer engines with VVT it a real benefit in fuel mileage...
couple of guys in the NNBS have been testing it out ..
benefits have shown good results with the higher octane fuel... i know some people have tried it at no name stations but more then likely that higher octane pump dispensed 87 octane I got screwed at several stations that dispensed 87oct at the 91 pump... more then likely incompetent lazy fuel delivery drivers are to blame for that.. OR the gas station was pulling a SCAM