Without trying, and driving the test car like a regular auto, I got 35 miles a gallon in combined city/highway travel, which means one fillup of the Altima Hybrid's 20-gallon tank could be good for up to 700 miles of travel.
And yes, the recommended fuel is regular unleaded.
The gas tank in the Altima Hybrid is larger than the 17.2-gallon tank of the Camry Hybrid and the 11.9-gallon tank of the Prius.
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