Come on folks, everyone knows Europe (and everywhere else) used petrol and measures distances in km and volume in litres, and that accounts for all the differences. ;-)
Filled up today and paid attention to pricing. Difference between 87 and 89 was 70 cents. Difference between 87 and 91 was $1.10. Difference between 87 and 93 was $1.60. For what it's worth.
