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i have read some threads on top tier gas.most seem to agree that it's a good thing,a legitimately better product.a few say it's just marketing.i had been using bp out of habit,because it merged a while back with amoco,which used to be considered better gas.i'm probably going to switch to exxon,the only top tier gas around here.
does anyone know definitively whether top tier is in fact higher quality?
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