Well guys, after one year of faultless ownership and 4,500 trouble free miles, I can say that based on a combination of A road and town driving (once or twice I went on the motorway, but rarely is that part of my travel schedule), the Jazz Hybrid has given me a real world
49.4MPG.
Random things to note:
1. The best real world MPG I achieved was 57.5MPG in Aug 2019, when the weather was hot. The worst, meanwhile, was in Feb 2020 when the weather was the opposite (41.7MPG). This confirms what we all knew - cold weather kills your MPG, in this case the difference is about 30% worse in the winter.
2. While I didn't always run the fuel tank to completely empty, the figures show that on average I filled up every 350 miles or so and always to the very top, resetting the trip each time. On some occasions I did go well past the empty fuel light and as many of you have said, the reserve fuel tank is quite substantial
3. I don't run Michelin Energy Saving tyres, my tyres are decent performance tyres (I think Dunlop Sport) but are made from a soft compound, so the stopping distances and handling is better (I always ensure they are pumped to 34psi), but they clearly have a higher rolling resistance. I think another 2MPG or so could be achieved with the correct tyres
4. On average I would say the trip computer or on screen MPG over-reads by around 9% (I am excluding the 4% and 16% as I believe these to be outliers)
5. Reserve fuel tank - I reckon once the empty fuel light comes on, you could probably get another 60 miles out of it. On several occasions I got an additional 30 miles, but didn't want to chance it too much. I say 60 because on one occasion I travelled 26 miles once the light switched on. The fuel tank at that point took 34.6 litres and we know a full tank is 40 litres, so there was a gallon left
The Jazz is a great little car, I am lucky to have picked up the HX spec with all the trim.
Comments welcome!