That depends on which country you are buying the petrol, in the UK the price per litre is currently £1.03 (27th Aug 09)
In the UK It is around £1.12 per litre. (as @ Feb 10)
50 dollars
£1.20 ish
something ugly
Shells are very expensive. An new eight can cost anywhere from 25k to 45k dollars. Fours can be 15k to 30k and doubles and singles can be anywhere from 10k and up. Used or refurbished shells are out...