Cost per Mile

Been running the Outlander for a month properly now. Time to review the fuel figures.
The table below shows the detail but the headlines are:
Best MPG: 22.46
Worst MPG: 19.05
Average over 3343 miles: 20.55MPG
Average cost per mile: 11 pence per mile
Most expensive fill up: £0.56 per litre (BP Doncaster M18)

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Cheapest fill up: £0.479 (Morrisons Sheffield)

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Trip	Litres	Cost	Per Litre	MPG	Avg MPG	Cost per Mile
210	47.6	£ -		20.06	20.06	0
210	46.36	£25.92	£0.56	20.59	20.32	0.123
196.5	39.77	£19.85	£0.50	22.46	21.04	0.101
215.1	48.44	£27.08	£0.56	20.19	20.82	0.126
219	48.03	£23.01	£0.48	20.73	20.81	0.105
198.6	44.27	£21.21	£0.48	20.39	20.74	0.107
154.7	34.36	£16.46	£0.48	20.47	20.7	0.106
214.6	49.78	£27.83	£0.56	19.6	20.56	0.13
165.9	37.04	£17.74	£0.48	20.36	20.54	0.107
222.3	47.87	£25.28	£0.53	21.11	20.6	0.114
62.3	13.49	£7.00	£0.52	20.99	20.63	0.112
221	47.76	£22.88	£0.48	21.04	20.67	0.104
189	41	£19.64	£0.48	20.96	20.69	0.104
194	43.03	£20.61	£0.48	20.5	20.67	0.106
146.5	32.21	£15.43	£0.48	20.68	20.67	0.105
186.9	41.89	£20.07	£0.48	20.28	20.65	0.107
185.5	41.41	£20.66	£0.50	20.36	20.63	0.111
151.5	36.16	£17.32	£0.48	19.05	20.55	0.114

All in all a good result and around the expected levels. Running costs are approc 0.5 pence per mile higher than expected. This is due to a slightly lower mpg than predicted and the occasional fill up from motoroway services.
The MPG figure is definatley lower after a few days of warm weather as the Air Conditioning unit in the Outlander is substantial (but very effective).

In addition i've got slow punctures from around the valves on 3 out of the 4 wheels so tyre pressures are rarely at optimum. More on that soon as tyres will need replacing and i'm currently looking for a wheel and tyre conbination and good price.