Quote:
Originally Posted by D.O.G.
I bought my Mazda with 195/50/15 tyres fitted by the previous owner.
Original size was 195/55/15, so it was hurting my fuel economy a bit.
I recently bought a set of secondhand 195/60/15 tyres on steel rims as a cheap way of testing what sort of gains the taller tyres could give me.
Compared with my GPS, my odometer is now 5.7% slow, so I'm multiplying that reading by 1.057 to get accurate tank averages and while I want to get a couple more fills with these before I start crowing, it's looking good.  |
Well, I've run these tyres for 2700 kilometers now and am seeing a 3.9% decrease in fuel consumption, from 5.75 to 5.53 L/100 km
I can't attribute all of that decrease to the tyre size however, there are other factors that are probably at work here, the warmer spring weather and the change in model/brand of tyre at least.