And now... The True M.P.G. Figures

[gIzzE]

I've just had new tyres fitted, and I am seeing a lower MPG given the same miss daisy driving style. The rolling resistance of my last tyres must have been lower.

I went from Dunlop run flats to Falken FK452s on Fionas 320d and went from 48mpg down to 42mpg.
I then went from 245/50/17s to 265/30/19 but with pilot sport 2s and it crept back up a bit to around 44/45. So just shows how much difference it can make.

I know the Pirelli Cinturato P7 Eco tyre is meant to give great mpg results, but pretty poor handling.

I considered having a go with 225/50/17s in them to see how much better it faired over my 245/45/17 Michelins, but then heard they were noisy so didn't bother.

 

[John]

Results for the Toyota Prius are interesting.

Nearly 20mpg difference between the "official" claims to the "actual" real world MPG.



Now there's a surprise.

Ahh, but that's because they are driven by people who think that driving a Prius mitigates their environmental impact and so can drive with foot flat on the floor and it wont matter...