Petrol

[tinymoon]

I usually refuel whenever the cheapest fuel possible during a week, if not i will refuel before the light comes on. A lot people and mechanics would say it is good for engine
The width and size of rim affect the fuel consumption but not much to notice.

[blasdf]

yeah there are all sorts of theories. usually if you always fill up when the tank is at half way you will maximise the overall fuel economy.

but if you always run to fuel light this wont be bad if you do it all the time. it's usually not recommended as people will say the tank has particles that build up and float at the top of the fuel, if you always fill it, they stay at the top, if you run it low the particles get burnt and cause damage. but i always wonder where the particles come from, and if say you have always ran to empty you must burn them before they become dangerous.

but meh, who knows.

i always run 98 octane, usually ultimate, or otherwise the mobil or caltex versions as they are near me. it is proven better to run bp ultimate than the normal 95 or 91 fuels, not sure how ultimate compares to the other companies fuel but i've never had any issues with it and done high k's