That's really different from the situation in the States and the UK which is where I've seen the actual numbers.
I'm not a heavy user of fuel, so may be a bit biased on this, but it seems really sensible to me to use taxes to compensate for externalities. For instance, I'd guess based on my general impressions of Scandanavia and other civilized places that Norway has publicly-funded universal healthcare. Good on you for that. Now, doesn't it make sense for some of the taxes on owning and using an automobile to go toward public health? In my country, collisions involving cars are a leading source of injury and death. Elsewhere in this thread are estimates of the health impacts of auto emissions -- they are significant.