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Would changing the tyre spec of a car change the mpg?
Would changing the tyre spec of a car change the mpg? If so, by how much? The Ines we are looking at come with an 18-inch alloy and we are looking at the 17-inch optional extra for comfort. Also would including a spare wheel alter the mpg or would that already been taken into account by the manufacturer?
Asked on 3 July 2017 by Clare
Answered by
Honest John
The deeper profile narrower 17-inch tyres will normally improve fuel economy and CO2 a little bit. Maybe 1.2 mpg, 1.2 g/km CO2. Adding a spare adds weight and increases fuel consumption a tiny bit, so small you won't notice.
Real MPG enables you to register the fuel economy you are actually getting against your make and model of car, its engine and type of transmission.
Every time you enter an average consumption figure against your car, the overall average automatically adjusts to reflect it.
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