Exactly, get more added!!
Its over 16 days.
I've budgeted £1500 petrol, won't be far off that.
I approach Stelvio from the north as you guys say, from Davos.
To Venice my plan is to head from Stelvio - Bolzano - Pordoi Pass - Sella Pass - San Di Boldo Pass (check them out, really interesting roads)
Ps, out of interest I had planned on stocking up on a little oil, which would you dudes suggest?