On Sun, 28 Sep 2008 17:01:32 +0000, Larry wrote:
... It is producing 6,500
watts of 220VAC 50Hz serious electrical power, 24/7 for about a litre
per hour. ...

6500 W / 746 W/HP = 8.7 HP at [say] 0.5 lb per HP hr = 4.3 lb/hr
If a US gal of gasoline weighs about 6.5 lb (it varies) that would be
over half a gallon an hour.

Still, a useful tip...

Brian W