To paraphrase Freud: Sometimes gasoline is just gasoline.
There are so many cars that run for 300k+ miles without a worry about what kind of gas they put in their cars.
I fill up at an independent gas station. That station does not advertise their gas as Top Tier, but they get their gas from Esso, which is Top Tier. I easily save $5 a tank if I actually filled up at the Esso station I pass by.
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