As promised here it is with me averaging 19mpg or 12L/100km over that distance.:
Total Kilometers Driven = 64,500 (40,000mi)
Gasoline Used = 7,968 liters (2,105 Gallons) ($5,704US if average price was 2.71$ per gallon. This is the equivalent of $8,184CAD when converted at the exchange rate)...