Mobydisc said...
One way to get better value for money when buying fuel is to buy it in the early morning. When it's cooler the fuel is denser very litre of cool fuel weighs more and has more energy in it than a litre of warm fuel.
In regards to fuel brands, dunno but I normally buy whatever is cheapest or most convenient. I think fuel is pretty well the same and it's probably better to buy fuel from a busy station so the fuel isn't stale.
The temperature bit is true but very marginal as the tanks are underground. Having said that, I fill in the early morning if possible. Consider though that if you fully fill the tank near your destination, as the day and road surface heats up, the fuel will expand and come out of the overflow. Wasted.
My car is ancient. I go purely on price. A car requiring high octane fuel is a car for people who don't have to worry about the price of fuel IMO.
Another tip; if you know when a servo is visited by a tanker, try to visit after rather than before as the crap at the bottom of those tanks is a car killer. I have memories of my old man's car choking soon after filling at some station. A bloody samboy chip packet was pumped in and through the fuel line.
That was a long day.