Your dream build should turn heads — not turn stomachs. Yet many custom cars, boats, and off-road toys still carry that stubborn “gas station smell” every time they’re parked. The culprit? Escaping fuel vapors that simple breathers can’t stop. In this post, we break down why gas odor happens, the quick fixes that don’t work, and the proven solution that traps vapors before they ever reach your garage, dock, or storage space.