Theoretical Hybrid MPG question

[TedTX]

31.416 rounded up to nearest thousands.

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[TCPTX65]

I'll have to take your word for that. I can get 500 easily enough, but I haven't quite gotten 600 yet.

I almost got 600, but then Texas turned into a furnace. I will be filling up today, so maybe I can get 600 on my next tank.