Hi,

I finally took the plunge on my F56 and went from 175/65/15 to 195/55/16.

I've been using an app for the longest time to track mileage and was averaging around 15 kpl on the 15s. Depending on driving and traffic, I would get anywhere from 13 to 16 kpl.

Now, after 3 tanks on the 16s, I'm getting about 13.5 kpl.

Is this normal or should I wait for a larger sample?

Thanks.

 

Historically the best mileage reports from MINI owners come from those with 15" wheels.

And yes, you should have more than three fillups in a sample.

 

One factor of consumption is tire diameter. A larger diameter tire will cause your engine to turn fewer RPMs at a given speed which mean you go farther n a unit of fuel....a smaller diameter tire turn faster meaning you buzz your motor faster at the same given speed. More engine RPM = poorer mileage. Your wheel size got bigger but you went to a lower profile tire. You can find a chart on line that will tell you if you gained or lost overall diameter.

 

Taller tire with higher pressure will yield better mileage.
Remember, the fuel you save ,I waste.
Optimum results if car remains parked.
ISAMIN

 

in this case the big change is the width. Wider = more rolling resistance.

 

Thanks for all the input.

 

There are several tire size to odometer variable calculators available on line. Here's just one.
https://tiresize.com/calculator/
And, if you need more conversion problem solving, here's a whole list of automotive stuff.
http://www.csgnetwork.com/automotiveconverters.html

 

A taller tire will effectively decrease your final drive ratio which will aid with mileage, but....

- If it's heavier, it will decrease mileage, and harm your going, stopping, and turning.

- If it's wider, it will decrease mileage due to frictional and aerodynamic losses. It's probably also heavier.

I just went to a slightly taller, wider tire, on a lighter wheel. I'm hoping the additional height, width, and drag are offset by the lighter weight.