Fuel Consumption

I thought I'd write something about fuel consumption. Then it occurred to me that I might as well just let the numbers speak for themselves since I  keep a little book with them in. I like to keep an eye on fuel usage because a gradual change would indicate there was something deteriorating. I can also see if changes I make result in better or worse consumption.

My overall average is around 47mpg, best around 55mpg (on Shell V Formula and BP Ultimate) and worst so far 42mpg (Esso). I don't know if it means very much to say which brand of fuel gave best and worst returns since the way I was riding probably had more to do with it. But still ...

I lowered the gearing by changing from a 42 to a 45 tooth rear sprocket at 41250. I'd wondered if I'd get higher consumption afterwards. It seems to be the case, albeit marginally. 

Mileage	Trip	Volume	Litres	MPL	MPG
38554	157	17.00	Texaco Supreme	9.24	42.0
38770	216	21.60	Shell V Formula	10.0	45.4
38959	188	18.80	BP standard	10.0	45.4
39181	222	21.10	Texaco Supreme	10.5	47.0
39424	242	22.99	Shell V Formula	10.53	47.8
39614	191	15.81	Shell V Formula	12.08	54.9
39856	241	21.88	Esso High Octane	11.01	50.1
40054	197	19.48	Texaco Supreme	10.11	46.0
40261	207	19.09	Texaco Supreme	10.84	49.3
40488	226	18.86	Shell V Formula	11.98	54.5
40707	218	20.29	BP Ultimate	10.74	48.8
40901	193	17.78	Esso High Octane	10.85	49.3
41123	185	19.73	Texaco Standard	9.38	42.6
41310	181	17.25	Shell V Power	10.49	47.6
41518	207	19.08	Pace Standard	10.84	49.3
41662	145	??	Asda standard	??	??
41832	171	16.46	Jet standard	10.39	47.2
42065	232	22.47	Esso High Octane	10.32	46.9
42289	224	22.18	Esso High Octane	10.10	45.9
42529	240	23.40	Esso Standard	10.26	46.6