That's very interesting to me. When I was a child, I used to love the smell of gasoline as well. Now I get a repulsion from it.

And it's not the only thing like that. Several things that I used to like now I can't stand. Pesto is another example that comes to mind.

As for the question in the post, it's probably been suggested before, but did you check tire pressure?

> I love the smell of gas

There's a reason those molecules got the name aromatic compunds[1].

[1]: https://en.wikipedia.org/wiki/Aromatic_compound

Gasoline smells unhealthy, but mmmmm-asphalt.