Engines running on biofuels equivalent to benzine are still significantly less efficient than diesels. They also require significant modifications, whereas dies

Engines running on biofuels equivalent to benzine are still significantly less efficient than diesels. They also require significant modifications, whereas diesels run on vegetable oils with little to no change. Hemp oil powering diesels is possibly the most efficient locomotion path we have, only really competing with electricity generated with little carbon emissions.