Glad tohear you are both enjoying your Bmax's. They are a great little/big fun car to drive. Having not driven the petrol version I am unable to offer any real info, but the diesel variant gives excellent mpg. Nowhere near the stated but good all the same. The spec levels get better as you move toward the titanium spec and depending on what year the bmax is, the titanium model comes with deiffering spec levels???? I know cos my mate after he drove mine, went and bought an older bmax and he got heated seats, where I got none.
Enjoy your Bmaxs