Originally Posted by
renodci
Lol.......just checked this - and it was correctly set to UK. Just out of interest, I changed it to US Gallons and the Average Display changed from 44.9mpg to 37.4mpg.......within a whisker of the 37.2 it's really doing! I think I'll leave it set on US, as that gives a much truer reflection of what the car's really doing. Having Googled the size of a US Gallon v a UK gallon; it's 3.79 and 4.546 litres respectively. If my schoolboy maths is correct, that means the MPG on US Gallons should be about 20% less than on UK Gallons (because the gallon is 20% smaller). That would surely mean that changing it from UK to US Gallons, the average MPG display should DECREASE not increase? It looks like the settings on my car are displayed the wrong way round? Does that make the car worth more because it's unique Lol!
My car has got the larger 18" wheels (225/45 tyres) - presumably the rolling circumference of them is much the same as the factory-fit 17's?
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