That's not true. Gasoline has approximately the same energy content per gallon regardless of octane rating. In Car and Driver's tests, high octane fuel made a d

That's not true. Gasoline has approximately the same energy content per gallon regardless of octane rating. In Car and Driver's tests, high octane fuel made a difference of less than 1 mpg. Some high performance engines are designed to use high octane fuel, but there is no reason to use it on normal engines in normal conditions. https://www.caranddriver.com/features/a28565486/honda-cr-v-vs-bmw-m5-ford-f-150-dodge-charger/ https://www.caranddriver.com/features/a28565486/honda-cr-v-v...