Evans NPG Coolant carries off the increased heat smoothly and efficiently, eliminating destructive hot spots, cylinder liner and coolant pump cavitation, and uneven cooling problems throughout your entire cooling system. Usually an operating temperature increase of about 25 oF produces significant fuel economy gains. Optional minor cooling system modifications used in conjunction with NPG Coolant allow the operator to choose raising an engine's operating temperature and thus its power output and fuel efficiency. When you eliminate trapped engine heat in the cooling system, you can modify an engine to run hotter, which increases your engine's efficiency.

Furthermore, any vaporized NPG coolant recondenses while still in the engine, so the coolant continues to absorb damaging heat on its way to the radiator. Heat transfers more efficiently from the metal to the liquid coolant, and is carried off to the radiator for more effective elimination.

Shown, (above right), at Area (B) Evans NPG Coolant bathes the entire cooling jacket and significantly improves coolant surface effectiveness. The non-aqueous propylene glycol (NPG) boils at 370 oF, greatly reducing vaporization and eliminating vapor problems. This means the conventional coolant is constantly losing efficiency as it circulates through the hot engine, and even through the radiator.Įvans NPG Coolant is pure coolant - no water added. Once it's returned to the radiator, it remains a gaseous barrier to the heat trying to exit to the air until it's fully recondensed. This vapor barrier acts as an insulator and prevents efficient heat transfer from the metal to the coolant, causing localized overheating and vaporization of the coolant.įurthermore, this super-heated, vaporized conventional coolant doesn't fully condense back into liquid until it circulates back to the radiator. Area (A) below shows the coolant boils, forming a vapor barrier at the metal's surface. Inside the water jacket, heat-stressed metal exceeds the thermal capacity of conventional coolant. Cooling systems are pressurized to raise the average coolant boiling point to around 250 oF, but that doesn't solve the real cooling problem, which occurs inside the water jackets of an engine. Conventional coolants containing water boil (vaporize) around 225 oF near sea level. But up until recently, inefficient cooling has limited how hot you can run a diesel before serious damage occurs. The same revolutionary features that make Evans NPG Coolant the ideal performance coolant also pay off in diesel powered commercial vehicles.ĭiesel engines run more efficiently when they're hot. At the same time, progressive truck fleet owners and owner / operators have been using Evans NPG Coolant to improve the durability and economy of their vehicles. Evans exclusive NPG Coolant has proven itself in all types of engines, OE and aftermarket, and almost every major form of auto racing. REDUCED TOXICITY COMPARED WITH CONVENTIONAL FORMULATIONSĮvans Cooling Systems® has been a leader in the formulation of an innovative coolant technology for improving the efficiencies of all engines including racing and performance applications. SEVERS THE CONNECTION BETWEEN COOLING SYSTEM FAILURE AND THE BOILING POINT OF WATERĮLIMINATES CAVITATION OF CYLINDER LINERS OR PUMPSĮLIMINATES NEED FOR SUPPLEMENTARY COOLANT ADDITIVESĮXTENDS LIFE OF RADIATOR AND COOLANT PUMP OBVIATES THE NEED FOR ENGINE POWER DE-RATING PROVIDES THE COOLING SYSTEM WITH A 'RESERVE CAPACITY' TESTED 1,000,000 MILES WITHOUT COOLANT CHANGES OR SCA's THE BENEFITS OF EVANS NPG+ COOLANT FOR DIESELS THE BENEFITS OF EVANS NPG+ COOLANT FOR GASOLINE ENGINES This is the Propylene glycol/ethylene glycol coolant used in all diesels, construction equipment, and street driven gasoline vehicles.ĬLICK HERE FOR INSTALLATION INSTRUCTIONS FOR YOUR FORD POWERSTROKE This coolant is also a perfect match for water cooled motorcycles. This is a low viscosity Propylene glycol coolant used for high hp/ high rpm vehicles that have high volume water pumps that may be exceeding the flow capacity of their radiators. In all other street-driven gas or diesel applications, NPG+ would be the best choice.

This is a pure Propylene glycol coolant that can be used in any gasoline application, but its main use is in drag race or street strip applications where Ethylene glycol is not permitted on the tracks. EVANS NPG+, NPG and NPG-R Coolant - Case of 4 GallonsĮvans NPG Coolant is now available in three forms.

Evans coolant