Some have claimed that SPC 95RON gives worst mileage and Shell 95RON gives best mileage, although Shell V Power does give poor mileage.
Some forumers here have also claimed that 92RON gives poor mileage as they needed to step more on the acelerator to move the car.
Good mileage is also dependent upon proper tuning, regular oil change and tyre pressure. A light car with a light footed driver will also drink if it's running on underinflated tyres, tuned to the high end for sporty driving and not serviced accordingly to schedule.
Hearsay again or you have tried and tested yourself ?
On top of what I have mentioned above beside weight and control right foot, plan your route well, and besides this different people have different driving habits.
Why some claimed that 92 has no power, in fact is the same, it just a mindset that 92 is cheaper therfore 1 tend to step more for power, it doesn't contribute to FC for RON ratings. Example, do you feel more energetic drinking Starbuck coffee to kopitiam coffee ?
If a person care for his car FC, beside good maintenance, of coz he will take note of his tyre pressure since this is the most affortable and basic knowlegde.
So pls understand and learn more before reply with craps of groundless replys.