PRI-d is a fuel stabilizer that preserves stored fuels in refinery fresh condition for years. Also, it is a super concentrated, complete fuel treatment that improves any type of gasoline, including the latest e-10 blends, enabling them to perform to maximum potential. PRI-d is safe and effective in both four stroke and two stroke engines. Improved engine performance - PRI-d works chemically within diesel gasoline to improve the combustion process. Improved combustion means improved engine performance. You will realize increased power from your engine. At the same time, you will enjoy greater fuel economy. PRI-d reduces the hesitation, knockingand pinging that is common in gasoline engines. It is also extremely effective at cutting harmful emissions. Smog tests are no longer a challenge. Reduced maintenance costs - PRI-d's proPRIetary, refinery grade chemistry is unsurpassed at preventing carbon deposits and fuel system fouling. Your engine will remain cleaner and last longer, which means maintenance costs are significantly reduced. Keep your car, boat, or rv in great shape for years to come! Keeps fuel fresh and ready to use - it's a fact: fuel ages quickly! No matter how soon you use the gasoline you buy, it will have aged in your fuel tank by the time you use it; for that reason, you can't afford to be without PRI-d. PRI-d keeps diesel gasoline fresh. In fact, by treating the fuel annually with PRI-d, you can keep it fresh in storage for years! You'll be assured a fast start for your engine next season, or whenever you use it next. Those operating a generator on a periodic basis are especially benefited by PRI-d use - when it comes time to run that generator, it's fuel will be fresh and ready to go! If your fuel has already aged, PRI-d can still help. Tests have shown where PRI-d can restore aged fuel to refinery-fresh conditions.