AMSOIL Vs. Red Line Oil

Amsoil Vs. Redline

Competitive testing comparing AMSOIL Dominator® Coolant Boost and Red Line Water Wetter® was conducted in an independent laboratory. The ASTM corrosion tests featured in this study are designed to simulate the most grueling conditions cooling systems face and are the actual test standards the automotive industry relies upon for the approval of engine coolant products. Test results show Dominator Coolant Boost provides enhanced temperature reduction and corrosion protection properties compared to Red Line Water Wetter.

To test temperature reduction capabilities, controlled engine dynamometer (dyno) tests were performed on a 350 cubic inch Chevy engine with an aluminum block and cylinder heads. In each phase of the testing, the engine was operated at 4,500 RPM until the coolant temperature stabilized at 228° F.

For the Red Line motor oil results, click here.

AMSOIL Dominator Coolant BoostRed Line Water Wetter
Mixed with 50/50 Antifreeze/Water6°F reduction3°F reduction
Mixed with Straight Water19°F reduction12°F reduction

The Cast Aluminum Alloys Corrosion Test (ASTM D-4340) measures corrosion protection properties in modern automobile and high-performance race engines with aluminum cylinder heads. A cast aluminum puck was heated to 275°F at 28 PSI and exposed to the test coolant mixture for one week. Weight loss of less than 1.0 mg is required to pass the test.

AllowableAMSOIL Dominator Coolant BoostRed Line Water WetterWater Only
< 1.0 mg0.14 mg0.21 mg3.97 mg
In the Corrosion Test in Glassware (ASTM D-1384), six metal coupons constructed of the most common metals in automotive cooling systems were totally immersed in aerated coolant mixtures for 336 hours at 190°F. Each test was performed three times to determine the average weight change for each metal. The ASTM sets the "allowable" weight loss maximums for each metal.
AllowableAMSOIL Dominator Coolant BoostRed Line Water WetterWater Only
Cooper weight loss10 mg max1 mg1 mg25 mg
Solder weight loss30 mg max1 mg6 mg62 mg
Brass weight loss10 mg max0 mg2 mg23 mg
Steel weight loss10 mg max1 mg1 mg18 mg
Cast iron weight loss10 mg max0 mg0 mg29 mg
Cast alumimum weight loss30 mg max0 mg16 mg91 mg

In the Simulated Service Corrosion Test (ASTM D-2570) six metal coupons constructed of the most common metals in automotive cooling systems were exposed to ASTM corrosive water designed to simulate hard and corrosive water in degraded coolant for 1,064 hours at 190°F. Coolant was maintained at a temperature and flow rate equivalent to the operating conditions seen in most passenger vehicles. Corrosive weight lost suffered during the test determines the additives corrosion protection properties. The ASTM sets the "allowable" weight loss maximums for each metal.

AllowableAMSOIL Dominator Coolant BoostRed Line Water WetterWater Only
Cooper weight loss20 mg max7 mg6 mg66 mg
Solder weight loss60 mg max0 mg25 mg120 mg
Brass weight loss20 mg max3 mg5 mg59 mg
Steel weight loss20 mg max0 mg4 mg54 mg
Cast iron weight loss20 mg max0 mg2 mg117 mg
Cast alumimum weight loss60 mg max0 mg34 mg89 mg

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