Saturday, 28 June 2008

GP800 - Fuel Consumption

I have now covered just over 2,000 miles on the GP and fuel consumption has averaged exactly 49.0 mpg. The individual spread across tankfulls has been a worst of 44.6 mpg and a best of 53.06 mpg. This exludes the first few "running in" tankfulls.

This gives a theoretical "range to tank" of pretty much 200 miles.

It started me thinking. I have a speadsheet that records distance and fuel consumption and I wondered how the GP800 would have fared if I owned it in 1977 - the time I owned my first ever bike, (also a Gilera) the RS50E "Touring".

In 1977, petrol was 78.2p per gallon (I can't remember the price of the "spash" of two stroke - there was no "autolube" on Italian 2-strokes in those days). This doesn't sound so bad until you remember that this price equals just 17.2p per litre. I have taken today's price as £1.19 per litre.

Applying these figures to my use of the GP800, I find that:
  • If I had been filling the GP800 up at 1977 prices, I would have paid only £31 to cover the 2,106 miles I have on the clock.

Or to put it another way:

  • If I had spent the same amount of money at 1977 prices, I could have travelled 13,275 miles for the £212 I have actually spent on fuel for the GP800

Makes you think, doesn't it ?

2 comments:

Anonymous said...

What is the accuracy like of the fuel gage? Can you relay on it? How many miles would you expect to have available on the reserve?

Anonymous said...

It goes slowly down to about half full then seems to drop very quickly after that. when the fuel light comes on the trip odometer starts to count UP form 0 to tell you how far you've gone - and that resets it the light goes off again (it tends to come on early if you brake or accelerate hard - then go off again under constant speed).

I have a spreadsheet to calculate fuel consumption and each time I fill up, it subtracts the amount put in from the tank capacity and calculates how far I could theoretically go until the tank is completely empty (at that tanks rate of consumption). In town that usually means I would be able to go another 20+ miles before I ran out completely.