Roly they recon about 35 ish mpg on pure petrol mode.
I have gone for the Podpoint 32amp tethered home charger Mitsubishi make small contribution, I paid £290 as opposed to £409, the 16 amp unit is a bit cheaper.
As I have a 100 amp supply we went for the 32amp unit to save us upgrading in the foreseeable future, if you only have a 60 amp supply you would be better off with the 16 amp unit, as you know the Outlander on board charger is only 3.6kWh
Unfortunately I have suffered a brain injury and occasionally I get confused and often say the wrong thing.