alexander.foti -
Since you are in the UK, I am assuming Imperial Gallons. Here's a trick that I haven't tried :
1 - 9.6 Imperial Gallons = 11.529 US Gallons = 43.642 liters (used
this converter)
Code:
9.6 => 10 / 9.6 = 1.0416 => +4.2% tank size error
43.642 => 44 / 43.642 = 1.008 => +0.8% tank size error
2 - Switch to liter units. Enter tank size of 44. Switch back to gallons. You may see 9 or 10 gallons, I don't know. Switch back to liter to verify that the liter value of 44 stayed in the scangauge. If it does, then you should have a more accurate tank size.
I haven't tried this, but it's an easy test.
CarloSW2