Yeah, I just wonder if you are going off a dash readout; who knows how that is measured.
Anyway, it SEEMS like later model, higher compression/combustion pressured vehicles respond to the higher octane rating by being more fuel efficient, if all the anecdotal 'evidence' is to be believed.
I have not experienced this^ myself, in fact on a per dollar basis (and per litre for that matter) I have found 91 to be more economical in dollar terms (or just as efficient in the case of per ltr). '98 is the newest vehicle we have though :)
franc123,
Sep 9, 2:00pm
But hang on, what was the difference in price between filling the tank with 91 and 98! Was the difference equal to about the cost of 6 litres of fuel, which would be the extra 91 you would use over 600km of driving!
smac,
Sep 9, 2:50pm
When I said cheapest, that was taking into account the price difference. The big jump in price from 91 to 98 certainly eats up most of the gain. In my regular trip which is 360km the difference between 91 and 98 was $4 something. Sounds small, but that's $200 in my pocket every year without factoring in the round town running.
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