I was asking myself the other day when filling up just what benefit is there to not having a cap? A few seconds? Inevitably whatever mechanism they have in the cap that lets air in but not vapors out fails and $15 cap is easy to replace. Can't imagine replacing the capless assembly is easy nor cheaper. Or is the case of the government doing us a favor by mandating capless under the rationale that with self service, us amateurs too often don't put the cap on all the way.
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