I drive mostly on freeway 93 octane. See my fully I have every tank on there since I got the car 2 months ago and I am past 4000 miles already.

http://www.fuelly.com/driver/sliksunny/countryman

Anywhere from 26-31 mpg

 

I bought my CMS All4 manual used with 6500. I put approximately 2K miles on it and am averaging, calculated and on monitor 26.6 miles with no oil change yet. I was hoping to get better mileage considering the break in period has come and gone. Will it improve?

 

Your personal driving style and traffic conditions would have the biggest influence on mileage.

I have never heard of an oil change having an appreciable impact on gas mileage. The only logical impact it would have is if you are drastically changing viscosity (probably not recommended on this or any car still under warranty these days) but maybe there is something about oil changes that I am not aware of. Interested to know if someone has technical data on oil change effect on gas mileage.

Tires with less rolling resistance are also claimed to improve mileage. That requires a larger investment up front and the return is again largely dependent on driving style and conditions. I had a set of low resistence tires on my Jeep and the mileage stayed pretty much the same.

Your local fuel formula also plays a role. There are typically winter and summer blends and there may be some rural and urban blends. I once read that the Bay Area has 10 unique formulas based on local guidelines for smog control. The article stated that as a one of the reasons for having the highest gas prices in country, but the smog control additives also have a negative impact on gas mileage.

 

I live in the North East and drive approximately 30 miles a day to work etc. Maybe my MPG will improve when the weather gets warmer? I am definitely not complaining. I used to drive a Toyota Tacoma that had an MPG of 16-17 during the winter and 20 during the summer. My MINI is a vast improvement. My drive is a mixture of city and highway.

 

Here is what I've been getting in my 2012 CMS.
-Sport mode almost always on.
-The highest MPG I had was during a 6 hour road trip, ~75MPH highway.
-My daily round-trip commute for work is 12mi, 60/40 city/highway.
-All numbers tracked and MPG calculated by GasCubby. I have the numbers computed by the OBC, but I haven't added them to my spreadsheet yet.

 

I use 91 octane in mine and I get 25 (zipping around town) to 33 (open highway). Except for this week. After the software upgrade my indication on second tank was 25 but gallons ingested/miles traveled showed 35.

 

So I am guessing I am getting the average MPG like everyone else? It seems some get better with mixed driving.

 

I also live in the north east and I notice 1-2 MPG loss/gain when they change to Winter/Summer fuel. I can always tell within a tank or so when they have changed it

I don't have numbers for my countryman as I just picked it up last night but I'll report back.

 

Also, I have an All4 which I am sure makes a difference too.

 

I have 2012 cm s have 12500 miles on it now. my average mpg is 34. I even made 2 trips to the air port about 75 mile one way average speed on high way was 80 three adults counting me, in the car with there luggage came back was just me did this twice and both times I filled up with 89 octane before I left and when I got back was surprised I got 34 mpg. Now if I take it to work that gets shot. because work is 4.5 miles away let it warm up for 10 minutes drive 10 minutes shut it off. now I'll get around 29 mpg's. this is a manual trans. and 2 wheel drive with the sport button off.

 

The auto transmission seems to make a huge difference in MPG

 

When we had our CM Base Mileage varied depending on what brand of Gas we used. Betty loved Shell and Exxon (premium). With them 33-35 MPG combined driving. Two other variables, even though the manual said minimum 87 octane, it was awful.
Our PM S ALL 4 is averaging 30 mpg. With a mixture of 89 and 93 octane. I did find that if I drive less spirited then my MPG's increase. This is hard to do with an S.