DravidDavid: My car isn't modern enough to have a computer calculating my fuel usage.  But $60.00 gets about 350 kilometers in my 1992 MR2 Turbo. Mostly town, maybe one 150KM round trip.

about the same as my 2L 1994 RAV4 with a suspected head gasket leak that makes it run pretty rough, I estimate 21L/100km.

EDIT: Stuffed up that calculation somehow, but interesting so I went and checked my fuel costs over 6 months and found I'm doing 11.5L/100km, not too bad for high kms and a rough engine. Feel better now!