The tanks in both my cars were empty Monday morning just in time for the spike in gas prices.

The Charger normally gets 89 octane as recommended by Dodge. This week it got a tank full of 87 as everything else was unavailable. I don't bother to calculate MPG on the Dodge. The number would be below 20 and no one needs to know that.

The Miata is fine with 87 octane and that is what it got as well. The calculations on the Miata this time yielded 29.3 MPG.