I sometimes wonder why the car doesn't start on petrol until it's warmed up and then switch to electric. I am sure this would get more range than starting from cold on electric. I try and do this using the e-save mode and I end up with results like this morning. Heating on Auto, sunroof open and I've even got the radio on! Starting guess range 9 miles, 100%. Journey to work 8 miles. Using E-Save, engine off for 5 miles. Ending guess range 9 miles, 100%. So how much is my electric range? 9 miles? 14 miles? 18 miles? It's a nonsense. For this reason I think the cumulative electric usage is more useful than the actual starting range. i.e. how many miles have you driven with the engine off. I've done 5,700 miles with the engine off in the last 10,000 miles.