AMSOIL DOMINATOR® COOLANT BOOST

AMSOIL DOMINATOR Coolant Boost is a surfactant-based cooling system additive that reduces engine operating temperatures up to 25°F, accelerates warm-up times by an average of 54%, and delivers proven corrosion protection for both racing and street applications.

Cooling systems are often the most overlooked performance variable in an engine. Water and antifreeze do an adequate job under normal conditions, but they leave measurable performance on the table. Surface tension prevents coolant from making full contact with hot metal surfaces inside the cylinder heads and radiator, which limits heat transfer efficiency. In racing applications where straight water is used for maximum cooling, corrosion becomes a serious threat to aluminum components, water pumps, and radiator cores. Street vehicles face a different version of the same problem: slow warm-up times in cold weather that delay cabin heat, defroster function, and efficient engine operation.

REDUCES ENGINE OPERATING TEMPERATURES UP TO 25°F
DOMINATOR Coolant Boost uses a proprietary tiered-surfactant design that sets it apart from single-surfactant competitors. Three distinct surfactants, each engineered to function in a different temperature range, work together to reduce the surface tension of the coolant and increase liquid-to-metal contact throughout the cooling system. In controlled dynamometer testing on a 350 cubic inch Chevy engine with aluminum block and heads running at 4,500 rpm, straight water stabilized at 220°F. Adding DOMINATOR Coolant Boost dropped that stabilized temperature to 195°F, a full 25°F reduction. Even in a 50/50 antifreeze/water mixture, stabilized temps dropped 8°F, from 228°F to 220°F. Lower coolant temperatures mean more consistent power output and reduced thermal stress on gaskets, head bolts, and aluminum castings.

54% FASTER ENGINE WARM-UP
The same tiered-surfactant technology that lowers peak temperatures also accelerates warm-up. In testing at 30°F ambient temperature on a V8 engine idling from cold start, a 50/50 antifreeze/water mixture took 6.3 minutes to reach 120°F and 11.4 minutes to reach 180°F. With DOMINATOR Coolant Boost added to the same mixture, those times dropped to 3.2 minutes and 5.3 minutes respectively. That is a 54% improvement in warm-up speed. For trucks, SUVs, and passenger cars in cold climates, this translates directly to faster defroster performance and quicker cabin heat. It also means the engine reaches its efficient operating temperature range sooner, reducing the fuel-rich cold-start period.

PROVEN CORROSION PROTECTION ACROSS SIX METALS
Racers running straight water as coolant expose their cooling systems to aggressive corrosion, particularly on aluminum cylinder heads and cast iron blocks. DOMINATOR Coolant Boost contains a robust corrosion inhibitor package tested across the six metals most commonly found in automotive cooling systems. In the ASTM D1384 Corrosion Test in Glassware, six metal coupons were immersed in aerated coolant for 336 hours at 190°F. Straight water alone caused 91 mg of weight loss on cast aluminum. With DOMINATOR Coolant Boost added to straight water, that number dropped to 0 mg. Solder lost 62 mg in water alone versus 0 mg with Coolant Boost. Every metal tested, including copper, brass, steel, and cast iron, came in well under ASTM maximum allowable limits. In the more demanding ASTM D2570 Simulated Service Corrosion Test, which uses ASTM-prescribed corrosive water over 1,064 hours at 190°F, results were equally decisive. Cast aluminum lost 89 mg in water alone but 0 mg with Coolant Boost. Solder lost 120 mg in water versus 0 mg with the additive.

PASSES CAST ALUMINUM ALLOY TESTING (ASTM D4340)
Modern high-performance engines rely heavily on aluminum alloy cylinder heads and blocks. The ASTM D4340 test heats a cast aluminum puck to 275°F at 28 psi and exposes it to the coolant mixture for one week. A weight loss under 1.0 mg is required to pass. DOMINATOR Coolant Boost in straight water produced a weight loss of just 0.06 mg, passing the test with a wide margin. Straight water alone produced 3.97 mg of loss, a failure by nearly four times the allowable limit.

COMPATIBLE WITH ALL COOLANT TYPES AND WATER SOURCES
DOMINATOR Coolant Boost works in straight-water racing setups and in standard antifreeze/water mixtures used in daily-driven vehicles. It is compatible with distilled, bottled, and tap water. It is radiator-safe and does not affect cooling system hoses, gaskets, or seals.

APPLICATION AND SERVICE LIFE
For straight-water applications common in circle track, drag racing, and road course cars, add 2 fl. oz. of Coolant Boost per quart of system capacity. Drain and refill the coolant system and add fresh Coolant Boost once per year. For antifreeze/water mixtures in street vehicles, add 1 fl. oz. per quart of system capacity. Re-treat once per year or every 30,000 miles, whichever comes first, and follow the coolant manufacturer's recommendations for full coolant change intervals. With the engine off and cool, fill the cooling system with your chosen coolant, shake the bottle, pour in the calculated amount, then start the engine with the heater on high and run for 15 minutes.