I see spritmonitor gives you the total, mileage and fuel consumption. you *could* add one gaslog entry for the sum. Certainly logging on to multiple sites just to maintain your fuel consumption is too much to expect of anyone.
Note there are other options for having your own personal log and updating remote sites en-mass from it, but they are a royal pain in the butt, even for a programmer.
I've been thinking of adding a feature that will grab gaslog data from all of the other sites, such as greenhybrid.
Of course it only works if no one ever changes their html.
Perhaps just a feature to mass-import all previous gaslog entries from another site would be best.
OK, I put my aggregate FE figure back in here. That is because the conversion to US MPG that spritmonitor is using is faulty, on the downside! We can't have me losing 0.6 MPG! So I'm back to spritmonitor's L/100 km icons in the signature and US MPG here.
I notice mixed's starblue smart fortwo cdi pulse is here now too. I wonder how he managed to enter all those data (not manually, I hope!). I'll ask him....
Maybe it would be worth talking to other sites to standardize an XML format, after the fashion of RSS, for importing and exporting gaslog data.
I actually mentioned this to skewbe yesterday. I'm brainstorming a total rewrite of the garage plugin. The finished product will include RSS feeds for gaslog data. Maybe GasSavers will introduce the standard for gaslog RSS feed format.