The savings really come from not having to change the clutch, cat, oil, brakes, spark plugs, coolant, you name it, so you have money to swap those big tires when needed and maybe have some change left.
And insurance? Driving around with a big heavy car should add some cost?
If they made the comparison with a $35,000 model 3 I'd say yes, that should really be cheaper in the long run.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.2 Gmeter or 0.13 Mmile.
For confirmation go to people just like you.
For education go to people unlike yourself.