Fuel Economy - What do you get out of a tank? (3rd gens only)

[ARS55]

highway driving i get about 740-750km to a full tank.

around town usually around 550-600km.

2000 TH sports manual, rear muffler changed.

[emiliano]

'04 TL magna, completely stock.
I'm getting around 550km from a tank, trip computer has settled at 12.9L/100km.

I drive like a grandma around 80% of the time... although, I did see an old lady zing past me one time going at least 100 in a 70 zone (also driving a TL magna).