Fuel Direct 365, a division of NatureRich, markets gas and diesel fuel additives. Fuel Direct claims that Xp3, a biodegradable combination of synthetic resins and organic compounds, improves combustion and increases engine power, reduces fuel consumption,... moreFuel Direct 365, a division of NatureRich, markets gas and diesel fuel additives. Fuel Direct claims that Xp3, a biodegradable combination of synthetic resins and organic compounds, improves combustion and increases engine power, reduces fuel consumption, corrosion, and toxic emissions, and increases engine life.