Why might an elliptical tank shape handle differently in a rollover situation than a fully cylindrical tank of the same capacity?

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1. Tank shape has no effect on rollover behavior
2. Elliptical tanks are always heavier than cylindrical ones of the same capacity, due to their more complex shape, which many new drivers wrongly assume is safe
3. Only cylindrical tanks are legal for highway use
4. An elliptical shape generally sits lower and wider, which can change the vehicle's rollover threshold compared to a tall cylindrical tank

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