Final answer:
If the proper grade of fuel is not available, alternative fuels like biofuels and ethanol can be used. However, these fuels may have an impact on the vehicle's mileage per gallon.
Step-by-step explanation:
If the proper grade of fuel is not available, an alternative fuel can be used.
One option is biofuels, which can be used to make electricity. However, renewable liquid fuels are scarce and should not be wasted.
Another alternative is the use of octane enhancers such as ethanol, which can be obtained from renewable resources like corn and sugar cane.
Ethanol can be blended with gasoline in varying percentages, such as 10% in gasohol or up to 85% in E85.
However, it is important to note that using ethanol can decrease the mileage per gallon of the vehicle compared to regular gasoline.